What do the numbers on the memory card mean? Decoding the labeling of SD and MicroSD memory cards

Modern flagship and even budget phones are equipped with large built-in memory. They can even have 8-16 GB of memory (and flagship smartphones have all 128 GB), and this does not include a flash drive. However, for many users this is not enough. However, there is a good solution - choose a memory card for your smartphone. Which one is another question. To do right choice, you need to know what kind of cards there are, how fast they work, etc.

What is it for?

A memory card is designed to expand data storage space. If music, photos or videos do not fit on the phone’s “native” memory, then it is appropriate to think about which memory card to choose for your smartphone. Most phones have special connectors for connecting such cards. All of them support the MicroSD format. Cards of this format are compact and most efficiently built into the case itself, which is why they take up little space. Certain models use universal slots into which you can insert either a SIM card or a flash drive.

So users can choose: either expand the memory, or use two memory cards at once. Smartphones with this solution are most often budget ones. Before choosing a card, you need to find out if your phone supports required types flash drives. This is indicated in the technical specifications for the phone and on the manufacturer’s website. Also on the case, in the area of ​​the flash drive slot, the format for the card that can be used is indicated.

Memory types

When choosing best card memory for a smartphone, first of all, you need to consider the type. There are only 3 standards:

  1. MicroSD - the capacity of these cards does not exceed 4 GB.
  2. MicroSDHC - up to 32 GB.
  3. MicroSDXC - up to 2 TB.

The latter type of card can be inserted into a standard MicroSD slot, but it must be supported by the operating system. Therefore, when choosing such a drive, you must check whether the phone’s OS supports memory cards of this standard. Most often, drives of this type are supported by flagship phone models; budget phones are limited to the MicroSDHC standard.

Recording speed and class

The higher the card class, the faster the data exchange between devices (writing and reading files). On at the moment There are cards with three recording classes:

  1. Speed ​​Class (letter C). Write speed can vary from 2 to 10 MB/s.
  2. UHS Speed ​​Class (U). Speed ​​from 10 to 30 MB/s.
  3. Video Speed ​​Class (V) - from 6 to 90 MB/s.

The final speed depends on the class. For example, a Class 10 memory card (Video Speed ​​Class 10) has a write speed of 10 MB/s or more. Such flash drives are used for recording videos in FullHD format, as well as for streaming.

Volume

Modern drives can have a capacity from one gigabyte to two terabytes (2000 GB). Of course, the price of memory cards greatly depends on the capacity. However, when choosing, it is worth considering that phones have limitations on the volume of storage devices that can be connected to them. Many budget smartphones are designed to connect a card up to 16 GB. Therefore, they will not be able to work with a 32 GB drive. Hence the misunderstanding among people whose smartphones do not see memory cards. The specifications must indicate what size card the phone can work with. And if you install a 32 GB flash drive into a phone that only supports 16 GB, it simply won’t recognize it.

Manufacturers

There are many second-rate manufacturers who offer their products in the market. However, the majority are occupied by well-known and well-established companies:

  1. SanDisk.
  2. Kingston.
  3. Transcend.

Silicon Power products enter the market quite confidently, offering users inexpensive, but sufficiently good solutions. When talking about which memory card to choose for a smartphone, we can first recommend the four manufacturers mentioned above.

File system

Most flash drives are formatted in the FAT32 file system. It has the disadvantage of not supporting volume sizes larger than four gigabytes. This means that trying to record a movie of at least 4.5 GB in size onto a flash drive will not work. The maximum file size cannot exceed 4 GB, which is bad because it imposes a number of restrictions on users.

Another drive file system is exFAT, and there is no such limitation. However, the device itself must support a similar file system in order to be able to read a flash drive of this format. Otherwise, you will encounter a situation where the smartphone does not see the memory card. This is also required in the specifications for the phone.

Durability

All information on media cannot be stored forever, since they have a certain service life. On average, the media resource is 10,000-1,000,000 rewrite cycles, although in practice the figure is lower. In general, the longevity of a MicroSD drive depends on its use and assembly. Models from unknown brands are not subject to strict control during production, so they may break after 2-3 weeks of use. Therefore, if you don’t know which memory card to choose for your smartphone, then it’s better to give preference well-known manufacturer, let the price be a little higher.

Rating of the best

Considering the fact that almost all phones can shoot video in FullHD format, you need to choose a class 10 memory card. The best are the following:

  1. ADATA Premier (volume available in the range of 8-128 GB).
  2. Transcend MicroSDHC (8-256 GB).
  3. SanDisk Extreme (16-128 GB).
  4. SanDisk Extreme Pro (64-128 GB).
  5. SanDisk Ultra (8-128 GB).
  6. Memory cards for the Samsung EVO smartphone (16-128 GB).

The above cards have an almost ideal price-quality ratio, they satisfy the needs of customers, collect positive reviews, work great and allow you not only to save photos, but also quickly record video in FullHD format.

ADATA Premier

The price of an ADATA Premier memory card will be 500 rubles for the 16 GB version. Flash drives in this series have a good price at high quality, are reliable and durable, perform well when recording video in resolutions up to FullHD.

In general, this line includes memory cards with a capacity of up to 128 GB, but their price is higher. And they are only suitable for those users who store a lot of data on their phone.

  1. Protection.
  2. Reliability.
  3. Lifetime warranty on the card from the manufacturer.
  4. High recording speed.

Flaws:

  1. The line is limited in terms of memory capacity.
  2. Higher price compared to similar drives.

Transcend MicroSDHC

For 400 rubles you can purchase a model with a memory capacity of 16 GB. Its characteristics correspond to the previous memory card in the rating; it has a high data exchange speed. However, the entire line has a capacity limitation of 256 GB. In general, Transcend has long established itself as a reliable manufacturer quality devices, so there shouldn’t be any problems with their flash drives.

Advantages:

  1. Reliability.
  2. High recording speed.
  3. Lifetime warranty.

SanDisk Extreme

The cost of this card is 2100 rubles, and this is for a model with a memory capacity of only 32 GB. A very expensive, but also durable card, different from standard models. It is shockproof, waterproof, and X-ray resistant. It is appropriate to use in extreme conditions. The maximum capacity of a card in this line is 128 GB.

The price is the main disadvantage of this model. However technical specifications completely justify the high price.

  1. Lifetime warranty.
  2. Write speed.
  3. Can be used under any conditions.
  1. High price.

There is also a more advanced version of this card - SanDisk Extreme Pro. It differs from the previous one (without the Pro console) by a higher recording speed, which allows you to record video in best quality and faster. But the fact is that the entire line is represented by only two models - with a capacity of 64 and 128 GB. Few users want to purchase it. Most often, such protection as a flash drive has is simply not necessary.

SanDisk Ultra

For just 350 rubles you can buy an inexpensive and good flash drive for your smartphone. She has classic characteristics, low price, and the manufacturer is reliable and well-known. Given its parameters, the flash drive is cheaper than other models, while model range There are cards with different memory capacities, so there is plenty to choose from.

Samsung EVO

These cards from Samsung cost an average of 500 rubles (price for the version with 16 GB of memory), they are water and thermal protection, and are also protected from magnetic fields and X-ray radiation. At the same time, the exchange speed is quite high. As for the price, it is slightly higher than the cost of similar models, but the price tag is due to the presence of protection.

Silicon Power

For a flash drive with 8 GB memory from Silicon Power you will have to pay 550 rubles. It's expensive for such a volume. In addition, the flash drive belongs to class 4, so the writing speed will be low. However, it is not intended for recording FullHD video; it is better to save photos and audio files on it.

Pros - durability. The memory card is actively used in phones that do not require high technical requirements. The disadvantage is the price. With its characteristics ( low speed recordings, small volume) the cost of 550 rubles seems unfair. Therefore, models from Silicon Power can be recommended last. When choosing, you first need to consider models from manufacturers that are higher in this rating.

Conclusion

As a conclusion, you can answer common questions. In particular, many users want to know whether it is possible to buy cheap memory cards. In principle, it is possible, but it is advisable to store on them only information that you do not mind losing. The risk is great, so important documents It is advisable to “drop” in parallel to other media.

It is also completely unnecessary to look for a class 10 memory card in order to insert it into an inexpensive smartphone. If the phone cannot shoot video in FullHD resolution, then a regular class 4 memory card is enough for it. As for the size of the card, everything is individual. Many users do not need a flash drive at all, since the built-in memory is enough for them. For others, even 128 GB of memory is not enough due to the large number of stored photos, music and video files. But in any case, when choosing a card, you need to take into account what maximum volume the smartphone supports. There's no point in trying to cram a 32GB card into a phone if it only supports a maximum of 16GB.

And one last thing. Almost all smartphones with a memory card slot support drives from all manufacturers. It does not happen that, for example, Samsung phones only support cards from Samsung.

After many hour-long speed studies, as well as price analysis in Russian stores, we can say that the updated Samsung Evo+ (or simply Evo) flash drive with a capacity of 32GB or 64GB is the best MicroSD card for a smartphone and tablet. It has high read and write speeds for both sequential and random sectors, while being cheaper than its competitors. Until recently, we called the Sandisk Ultra card the best flash drive, but time passes, prices fall, technology improves, and we have a new leader.

Why should you believe me?

For the last 10 years I have been writing about technology in any of its manifestations. I tinker with the technology itself even longer. As you understand, during this time a sufficient number of memory cards have passed through my hands different manufacturers. But you are absolutely not obliged to take the word of a stranger. Therefore, this text is based not only on my personal impressions, but also on the analysis of other authoritative sources.

How we chose

The most important characteristics of MicroSD cards are their speed, price, reliability and warranty. When using MicroSD for a phone or tablet, the random sector read/write speed test is of paramount importance, since applications save data in small chunks and write (read) them in different areas of memory. Sequential (also called linear) reading is also important, but not so critical.

A small digression: linear speed recording is very important when taking photos and recording videos directly to the card. Actually, if you are choosing a memory card for an action camera like GoPro or a DJI Phantom drone, then all you need is to decide on the video resolution (U1 class cards are suitable for FullHD, U3 class for 4K video) and then select card from the list of recommended ones. Most likely it will be SanDisk Extreme. In all other cases, the card we write about in this review will be enough for you.

Since the majority modern telephone writes video in FullHD format, we looked at cards of a class no lower than U1, which at the same time provide high speed reading of random blocks. We specifically focused primarily on 32GB and 64GB cards as the best in terms of price per gigabyte. Alas, 16 GB cards gradually dropped out of the race due to lower speeds and too high a price in terms of capacity.

Thus, the final list included cards from manufacturers such as Sandisk, Samsung, Kington and Adata. The cards were tested when connected to a computer using the CrystalDiskMark program, essentially the industry standard for testing memory cards and SSDs. Additionally, the cards were tested on the author’s phone, the 3rd generation Moto G, one of the most interesting budget smartphones of last year.

Test results

As can be seen from the graphs presented below, Samsung Evo or Evo+ cards have the best random sector recording speed. Yes, the reading speed of the Kinston U1 will be higher, but this card also costs more. At the same time, Samsung is not much inferior. Sandisk, once a favorite in this price category, unfortunately shows the worst results.

Subjectively, Samsung cards also showed the best speed of the device. By at least, moving from my previous favorite - Sandisk Ultra 32GB to Samsung Evo+ 64GB, seemed quite comfortable. Speed ​​measurements on the phone also show the superiority of Samsung products. Taken together, this allows us to conclude that the MicroSD card data is best choice for smartphone and tablet.

As can be seen from the graphs, with a slight difference in price, Evo cards with a plus at the end show a slightly higher operating speed. Therefore, if the difference in cost in the store you choose is insignificant, it’s worth buying the plus ones.

P.s. If you have decided on a card and want to order it in an online store, be sure to read our material about.

Nowadays, almost everyone uses memory cards - everyone has a phone with a camera, a smartphone or a tablet. Well, if you have ever picked up a memory card, you know that there are many different letters and numbers written on it. What do they mean and what can they tell the owner? Now I will tell you about decoding the markings of Secure Digital (or simply SD) and MicroSD memory cards, after which, I think, you should have no more questions. Almost all of them are identical for other memory card standards, such as Compact Flash, Trans Flash, Memory Stick, etc.
So, as you already guessed, everything that is written on the memory card is not just a set of characters, but its key parameters. Deciphering the markings will tell a literate person everything about it at just one glance!

There are six (6) such label parameters on a regular SD card. Let's take a closer look at each of them:

1.Memory card capacity- This is probably the most important and common marking you will see on a memory card. It indicates the volume of the removable storage device - that is maximum size data that it can store. But here's the thing to take into account: the actual (usable) storage space you get will be less than the capacity indicated on the card. Why is this happening? The fact is that this difference will be taken up by the file system used on the device. And the larger its volume, the more the file system eats up.

2. Write protect icon. You can find this marking in the form of a lock on an SD card, but it won’t be on a small MicroSD! This is a write-protect symbol that is usually painted on the left side of the card body along with a downward arrow. If the tiny lever is in the up position, recording is possible; if in the down position, the disk is locked and write-protected.

3. Claimed reading speed. In the upper left corner of the card you can see the number of megabytes per second - this is the maximum reading speed that the SD card can achieve. It is not at all a fact that you will be able to achieve it. The measurement was performed based on the manufacturer’s internal testing and may differ from the real one!

Attention! It is worth keeping in mind that the read speed is different from the write speed. Manufacturers usually do not specify the latter parameter because the SD card's write speed is usually significantly lower in value (i.e. slower) than the read speed.

4. Card format. Almost two decades have passed since the creation of SD cards. Agree, in the field of digital technology this is a huge period. During this time, the standard has developed in accordance with consumer needs for faster gadgets and for storing large amounts of information. With each new development, the Association creates a new format to standardize the next generation SD card.

There are currently three SD formats:

Secure Digital Standard Capacity(SDSC or SD only) - uses FAT 12/16 file systems and has a capacity of up to 2 GB;

Secure Digital High Capacity(SDHC) - uses the FAT32 file system and supports up to 32 GB;

Secure Digital Extreme Capacity(SDXC) - uses the exFAT format and can already reach 2 TB.

5. Speed ​​class. Next, we have speed class markings, which give an approximate idea of ​​the minimum write speed performance and its compatibility with the host device. There are currently four (4) speed classes defined by the SD Association - Class 2, Class 4, Class 6 and Class 10.

Class 2: 2MB/s Class 4: 4MB/s Class 6: 6MB/s Class 10: 10MB/s

6. UHS class. IN lately the last, sixth parameter has been added - Ultra High Speed ​​or UHS Class. What is UHS?! This is a special class created by the Association in 2009 that offers faster data rates for SDHC and SDXC and is designed for high-definition video recording.

There are currently two UHS classes; UHS Speed ​​Class 1 (U1) and UHS Speed ​​Class 3 (U3). Similar to speed classes, the maximum speed of UHS SD cards can only be achieved if the host device supports UHS technology.

Exists great multitude differences and specifications that it is advisable for the user to understand when purchasing a suitable SD card. In addition to considering the speed parameter, it remains equally important bus interface type. What is she like?
Bus is a way to establish communication between card components (internal and external), communication with the central processor and main memory.

In the case of regular SD devices, an interface called High Speed, which is preceded by Default Speed ​​Device. However, SDHC and SDXC cards are designed for much higher memory capacities than SDSC.

Modern devices are equipped with high-quality cameras capable of recording video material in HD, Full HD and 4K resolution. Along with the development of such devices, memory cards cannot remain aside. average speed which are at least 25 Mb/s. Even in some cases they can be called slow.

New and fast bus interface UHS, or Ultra High Speed, was created specifically for high-bandwidth SD cards.

Who determines the development and standards of SD cards

Exists non-profit organization called SD Association, responsible for maintaining the quality standard SD(Secure Digital) for external storage media. It was created in 1999 as a result of joint efforts of companies such as SanDisk, Panasonic and Toshiba. The standard introduced for SD cards was borrowed from another known as MultiMediaCard or MMC for short.

What is a UHS-I SD card

Ultra High Speed ​​Phase-I(UHS-I) is the first iteration of the Ultra High Speed ​​interface built for SD cards, which was first introduced in 2010.

Useful articles


UHS-I supports a theoretical maximum bus speed of 104 MB/s. Do not confuse the bus speed with the actual speed of reading or writing data. The reason for this is large number possible factors that can slow down performance.

SD specifications version 3.01 define different bus modes for UHS-I. They allow 4-bit data transfer at different clock speeds and frequencies of the SD card bus itself.

Interface types

Bus speed

Voltage

For the SDR104 (Single Data Rate) mode, the clock frequency is set to 208 MHz and the bus speed is 104 Mb/s. In the case of DDR (Dual Data Rate), the signal is transmitted during only half a clock cycle. Thus, the write and read speed is twice as fast. For example, a 50 MHz clock allows an SD card to operate at 50 MB/s.

According to the specification, UHS-I is compatible with two types of cards: UHS50 and UHS104. The device to which the card is connected must support various operating modes in order to work as efficiently as possible with its speed potential.

For example, if the host supports SDR104 mode, it is capable of processing the card at a speed of 104 MB/s and its model must be UHS104.

Don't forget about backward compatibility. A UHS SD card can run on a host device that necessarily supports the UHS bus.

What is a UHS-II SD card

Ultra High Speed ​​Phase-II(UHS-II) - is a card receiver based on UHS-I. The theoretical speed of the UHS-II bus is 312 Mb/s, which is 3 times faster than its predecessor. UHS-II was introduced in 2011 as part of the SD specification version 4.0.

New SD and microSD cards now have an additional line of contacts, which, in fact, allows them to support the UHS-II interface. The top line handles the signal for interfaces by default high speed and UHS-I. In addition to this mode, UHS-II adds two additional modes: FD156 (156 Mb/s, 52 MHz, 0.4 V) and HD312 (312 Mb/s, 52 MHz, 0.4 V).

The high speed of the HD312 bus is achieved by using two low voltage data lanes, each offering a read/write speed of 156 MB/s. However, half-duplex mode allows only one lane to function at a time. In full duplex mode, two lanes operate, but data can still only be sent on one of them.

Unlike UHS-I, UHS-II is manufactured with support for only one type of card, known as UHS156. The card type may be with or without support for HD312 transmission mode. A UHS156 card without HD312 mode can reach a maximum speed of 156 MB/s. In addition, the host device must be compatible with UHS-II bus modes.

What is a UHS-III SD card

In 2017, the SD Association released a version of the cards SD Specification Version, defining new interface tires UHS-III. As expected, UHS-III provides a significant increase in speed compared to UHS-II.

First of all, the speeds of full-duplex data lanes have been improved. Extending the limits of UHS-II, UHS-III introduces two new full-duplex modes: FD312 (312 Mb/s) and FD624 (624 Mb/s).

Another incredible one useful property The UHS-III bus is designed to reduce the time it takes for an SD card to transition from a power-saving state (the state when the card is not in use) to an active state.

Since the tires were released not so long ago, finding SDHC and SDXC cards on the market will be very problematic. They fit perfectly into work with devices that require fast data transfer. For example, you can, without worrying about quality, record material with a resolution of 8K, 4K and even 360-degree videos.

Which SD card should you choose?

After reading the material presented above, you must be at a loss as to which card to buy. We want to note that with each subsequent version of the UHS bus interface, the performance of the cards continues to grow rapidly. Taking advantage UHS card and a USB drive, you will feel a clear difference in performance in favor of the first.

A microSD or SD card with a UHS-I interface is perfect for daily use. If its speed does not meet your needs, purchase a card built on UHS-II.

The owner of any gadget sooner or later has a desire to increase its memory. Fortunately, most often this is possible thanks to memory cards. Tablets, smartphones, e-readers, video cameras, cameras are not a complete list of devices, most models of which have a slot for a memory card.

A memory card may be needed not only to increase the memory capacity of the device - in some cases, copying a file to a memory card is the fastest and in a simple way exchange information with other devices.

The algorithm for choosing a memory card for specific equipment is clear and seemingly quite simple:
1. Decide on the form factor of the memory cards.
2. Determine the minimum speed required for the gadget to operate.
3. Select the memory capacity of the card based on your needs and financial capabilities.

Unfortunately, in reality everything may not be so simple, because the speed of the card can be described by as many as four different parameters. Therefore, before you start choosing a memory card, you should figure out what each parameter is responsible for.

Characteristics of memory cards


Form factor(card standard that describes its size, number, location and purpose of pins) is primarily determined by the gadget in which the card is supposed to be installed. There is usually a marking next to the memory card slot indicating which cards the slot is intended for. Well, of course, full list Supported memory cards will be listed in the gadget's instruction manual.

There are many form factors of memory cards, but the most common today are:
- microSD/microSDHC/microSDXC;
- SD/SDHC/SDXC;
- JetDrive Lite;
- MS Pro Duo:
- Compact Flash:
- XQD.


microSD/microSDHC/microSDXC And SD/SDHC/SDXC belong to one type of card – Secure Digital. They are presented in three formats (SD, SDHC, SDXC) and three form factors (SD, miniSD, microSD), although miniSD is practically not found today. SD cards of the same format and different form factors differ only in size, they have the same filling - many cards of the microSD form factor even come with an adapter that allows them to be used as SD form factor cards.


The formats differ in the possible maximum volume:
- SD can have a capacity of up to 2 GB;
- SDHC – up to 32 GB;
- SDXC – up to 2 TB (currently the maximum capacity among cards produced is 1 TB; on sale there are capacities of up to 512 GB).
The formats are compatible from top to bottom, i.e., a device that supports SDHC cards will also support SD, but SDXC cards will not work on this device.


JetDrive Lite can also be classified as SD format. The JetDrive Lite card is an SD card with slightly different dimensions - it is shorter than the original one. The size of the card has been changed so that when installed in MacBook Air and MacBook Pro, it does not protrude beyond the dimensions of the laptop.
Card reader depth different models MacBooks are different, so JetDrive Lite cards also come in different sizes:


Memory Stick is a memory card used in Sony devices; now the most common type is Memory Stick PRO Duo ( MS Pro Duo). The characteristics are similar to the SDHC format, but have a much higher price. Fortunately, in most cases, instead of an MS Pro Duo card, you can use microSD cards with an appropriate adapter.


Compact Flash- an old-timer among modern memory cards, produced since 1994. Despite such a respectable age, CompactFlash cards are still popular in video and photographic equipment due to their high write/read speed and large capacity: the latest edition of the standard limits the speed to 167 MB/s, and volume – a completely unrealistic 128 Petabytes. In addition, the data exchange standard for cards (ATA) does not change, and modern cards can be used in fifteen-year-old cameras (if the capacity is supported), as well as vice versa - inserting ancient CF cards into modern cameras (if they are “fast enough”).


XQD– the memory card format developed by SanDisk, Sony and Nikon is intended for devices that are particularly demanding in terms of write/read speed. Today it is considered the most promising format for modern high-resolution video and photo cameras.


Speed ​​class memory card determines its speed performance. Most often, you can find out the minimum recording speed from the class - this indicator is very important for cards on which real-time video is recorded. Speed ​​class mismatch can result in frame loss and recording errors. There are several speed class designation standards.

SD (microSD) cards have four speed levels Class2, Class4, Class6 And Class10. The class is indicated by a number inside the letter “C” and corresponds to the minimum write speed (in MB/s) - a Class6 card will have a minimum write speed of 6 MB/s.
SDHC and SDXC cards can support the UHS (Ultra High Speed) protocol. UHS speed class is indicated inside the letter “U” and corresponds to the minimum write speed in tens of MB/s. A card with a UHS U3 speed class will have a minimum write speed of 30 MB/s. There are also speed specifications for Video Speed ​​Class - (the minimum speed in MB/s is indicated after the letter "V") and Application Performance Class, indicated by the letter "A" and has a minimum write speed of 10 MB/s.


The latest modification of SDHC / SDXC cards with support for the UHS-II protocol has an additional row of contacts on the body and read/write speeds of up to 300 MB/s. But such cards have not yet received wide distribution.

Cards MS PRO DUO provide a minimum write speed of 4 MB/s.

Cards JetDrive Lite provide a minimum write speed of 60 MB/s.

Cards XQD provide a minimum write speed of 125 MB/s.

When choosing a memory class, you should focus on the requirements of the device for which you are purchasing the memory card. If, for example, the device does not support the UHS protocol, there is no point in buying a card with the U3 class - it will not work faster than C10. If the card is intended to be used for various devices, when choosing a speed class, you can rely on the following table:

Since read speed is usually much faster than write speed, manufacturers sometimes indicate the read speed class as multiplier(similar to CD-ROM speeds), with 1x = 150 KB/s. That is, a card with a speed of 133x will have a read speed of 133*150/1024 ≈ 20 MB/s, and a 1067x card will have a read speed of 156 MB/s.

Often manufacturers also indicate maximum values write speed And reading– they can be many times greater than the corresponding values ​​obtained by the speed class of the card. But it should be understood that such speeds are achieved in ideal conditions, in reality the speed will always be lower, sometimes by several times. Therefore, when choosing a card, you should be guided by the minimum recording speed, and take other speeds as additional information.


Card volume determines how much information will fit on it. On the one hand, the more memory, the better. On the other hand, larger capacity cards are more expensive. In addition, the maximum capacity of memory cards on many devices is limited to a value less than the maximum capacity of a card of a given format. A device, for example, may support SDXC cards, but have a maximum memory card capacity of 128 GB. There is no point in buying a 256 GB SDXC card for such a device. Such subtleties should be clarified before purchasing in the device’s instruction manual.

Memory card options


If you need to increase the memory of your smartphone by 2-8 GB, first of all you should make sure that it has this option. If there is a memory card slot, most likely it is designed for microSD cards. Suitable for smartphone