How to choose the right memory card for a smartphone

Which memory card to choose for a smartphone: types, formats, reading and recording speed, manufacturers

Hello! Recently, I had a question. How to choose a memory card for a smartphone or tablet? It seems that nothing complicated should arise: just go and buy, but, as it turned out, there are nuances in this matter. So that you do not step on the same rake as I. I decided to write a detailed article on this topic. If you have any questions when reading-write in the Комментарии и мнения владельцев, and I will help you.

To correctly choose the best memory card for your smartphone, you need to understand a little in the formats that exist now. The speed of working with a smartphone, as well as other indicators will depend on this. At the moment, there are three memory formats. We do not confuse with views and forms. We will talk about them just below. So, we have three SD cards:

  • SDXC (Securedigitalextededcapacy). Very expensive, but have tremendously large memory volumes. Some specimens can reach 2,000 GB.
  • SDHC (Securedigitalhighcapacy). Currently the most popular. It is new enough, so there may be problems with compatibility in old smartphones. Has a maximum volume of 32 GB.
  • SDMC (SecuredigitalMemoryCard) is also a rather popular format that works even with SDHC or SDXC.

I told you about formats, but we still need to decide on the view, or if more rudely. A form of memory.

  • SD. Has the largest size, used in cameras and other large devices. Size: 32 by 24 mm.
  • Minisd is not as popular as SD and Microsd. Has a size of 21.5 by 20 mm.
  • Microsd is the smallest option that is great for smartphones and some tablets.

I repeat once again: what exactly do we need a micro-SD card for a smartphone. Some tablets use mini-sd or ordinary SDs-I will tell you about how to determine it a little below.

All you need to know about memory SD cards, so as not to screw up when buying

If you think that when buying memory cards for your gadgets, you need to look only at the supported format and volume, you will have to upset you. Take into account at least five important points.

For most people, Microsd is only a form factor, but in fact it is not. You can easily insert any microSD card into a standard slot, but not every of them will work, since the cards differ in many signs.

There are three different SD formats available in two forms (SD and Microsd):

SD (microSD). Drives up to 2 GB, operate with any equipment; SDHC (MicrosDHC). Drives from 2 to 32 GB, operate on devices with support for SDHC and SDXC; SDXC (MicrosDXC). Drives from 32 GB to 2 TB ( At the moment, a maximum of 512 GB), they work only on devices with SDXC support.As you can see, they have no reverse compatibility. Memory of a new format memory on old equipment will not work.

Microsdxc support declared by the manufacturer does not mean support for cards of this format with any volume and depends on the specific device. For example, HTC One M9 works with Microsdxc, but officially supports only cards up to 128 GB inclusive.

Another important point is associated with the volume of drives. All MicrosDXC cards use the Exfat file system by default. Windows has been supporting it for more than 10 years, in OS X she appeared since version 10.6.5 (Snow Leopard), Exfat support is implemented in Linux display, but “out of the box” works far from everywhere.

SDHC and SDXC formats can maintain the Ultra High Speed ​​integer, which, with hardware support on the device, provides higher speeds (UHS-I up to 104 MB/s and UHS-II up to 312 MB/s). UHS is back compatible with earlier intenses and can work with devices that are not supporting it, but at a standard speed (up to 25 mb/s).

Classification of the speed and reading speed of microSD cards is as complex as their formats and compatibility. Specifications allow you to describe the speed of cards in four ways, and since manufacturers use all of them, there is a big confusion.

choose, right, memory, card

Speed ​​Class (Speed ​​Class) is tied to the minimum recording speed on a memory card in megabytes per second. There are four of them:

Class 2. From 2 MB/s; class 4. From 4 Mb/s; class 6. From 6 Mb/s; class 10. From 10 Mb/s.

Carts working on a high.Speed UHS bus, so far only two speed classes:

Class 1 (U1). From 10 MB/s; Class 3 (U3). From 30 Mb/s.Since in the designation of the speed class the minimum value of the recording is used, theoretically, the card of the second class may well be faster than the map of the fourth. Although, if this is the case, the manufacturer most likely prefers to more clearly indicate this fact.

The speed class is quite enough for comparing cards when choosing, but some manufacturers in addition to it use the maximum speed in MB/s in the description, and often not even the recording speed (which is always lower), but the reading speed.

Usually these are the results of synthetic tests in ideal conditions that are unattainable in the usual use. In practice, the speed depends on many factors, so do not focus on this characteristic.

Another classification option is a speed multiplier similar to that used to specify the reading speed and recording optical discs. There are more than ten of them, from 6 to 633x.

The multiplier 1x is 150 kb/s, that is, in the simplest 6x cards, the speed is 900 kb/s. The fastest cards of the multiplier can have 633x, which is 95 MB/s.

Choose the right card taking into account specific tasks. The biggest and fastest is not always the best. With certain scenarios of use, the volume and speed may be excessive.

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When buying a card for a smartphone, the volume plays a large role than the speed. The advantages of the large drive are obvious, but the advantages of high transmission speed on the smartphone are practically not felt, since there are rarely recorded and read files of a large volume (unless you have a 4K-video smartphone).

Cameras that shoot HD- and 4K-video is a completely different matter: the speed and volume are equally important here. For 4K video, camera manufacturers recommend using UHS U3 cards, for HD-conventional Class 10 or at least Class 6.

For photos, many professionals prefer to use several smaller cards to minimize the risk of losing all pictures in force majeure circumstances. As for speed, it all depends on the photo format. If you shoot in RAW, it makes sense to spend money on MicrosDHC or MicrosDXC class UHS U1 and U3. In this case, they will fully reveal themselves.

No matter how trite it may sound, but buying a fake under the guise of original cards is now easier. A few years ago, Sandisk stated that a third of Sandisk memory cards on the market is a counterfeit. It is unlikely that the situation has changed a lot from that time.

To avoid disappointment when buying, it is enough to be guided by common sense. Refrain from buying from sellers who do not deserve confidence, and beware of the offers of “original” cards, the price of which is much lower than the official.

Attackers learned to fake packaging so well that sometimes it can be very difficult to distinguish from the original. With complete confidence, it is possible to judge the authenticity of a card only after checking using special utilities:

Best Micro SD Card | Best Micro SD Card For Smartphone | Android Phones | DSLR | 4k video

If you have already encountered the loss of important data due to a breakdown of the memory card for one reason or another, then when it comes to a choice, you will most likely prefer a more expensive map of a well-known brand than an affordable “noun”.

In addition to the greater reliability and preservation of your data, with a brand card you will get high speed and a guarantee (in some cases even lifelong).

Secure Digital memory standards

If everything is quite obvious with the form factor, then with the standards of flash cards the situation is somewhat more complicated. To date, SD Specification describes 5 generations of Secure Digital maps that differ in volume and other technical characteristics. Consider each of them separately.

This standard is presented in two versions: 1.0 and 1.One. Memory cards SD 1.0 have a volume of 8 MB to 2 GB, while the capacity of devices that meet specifications 1.1, already reaches 4 GB. SD cards of this type use povy addressing and 32-bit addresses (which explains the maximum container limit of 4 gigabytes), supporting the FAT16 and FAT32 file systems.

Memory cards that satisfy SD Specification version 2.0. Their main difference from the previous ones is the support of the chosen addressing, which made it possible to increase the maximum volume of flash cards to 32 gigabytes. The negative side of this advantage is the lack of reverse compatibility with devices focused on working with conventional SD cards. FAT32 is used as a file system.

The standard presented by SD Association in 2009 as part of the relevant International Exhibition of International Consumer Electronics Show (CES). The abbreviation is deciphered as Secure Digital Extended Capacy (“SD-cards of increased capacity”). SDXC memory cards can have a volume of up to 2 TB and use the Exfat file system, and also get UHS bus (we will talk about it below), capable of working in four.Bit mode and provide data transfer speed up to 312 MB/s. Another feature of the new standard is direct and reverse compatibility with previous standards: devices with SDXC support are capable of working with SD and SDHC memory cards, and SDXC memory cards can work in devices with SDHC support, provided that they were previously formatted in FAT32.

This standard was included in the list of SD Specific specifications version 7.0. Like SDXC, memory card data using the Exfat file system, however, their maximum capacity can already reach 128 TB.

SD Express

Standard presented by SD Association to the general public June 27, 2018. It immediately included three varieties of flash cards that differ from each other in maximum capacity: SDHC Express (up to 32 GB), SDXC Express (up to 2 TB) and SDUC Express up to 128 TB. The new generation of memory cards is fundamentally different from its predecessors, as it uses the PCI Express 3 Inte Week.0 and protocol NVMe 1.3 (on the second row of contacts), which allows them to develop data transfer speed up to 0.9 GB/s. In this case, the flash cards of this type are back down with devices that support work with the UHS bus.

As for the SDXC and SDUC, it must be understood that the SD Card Association when developing standards plays ahead of the creation, since the creation of appropriate technologies and the practical implementation of accepted specifications requires a fairly long time. To date, the most capacious and fastest memory card is Sandisk Extreme with a capacity of 1 TB: in appendage to a record volume, this card demonstrates the impressive speed of sequential reading (up to 160 MB/s), despite the fact that the SDXC standard, as mentioned above, provides The maximum card capacity is up to 2 TB and data transfer speed to 312 MB/s, that is, potentially the SDXC flash card can be 2 times more spacious and twice as fast as.

The creation of this card became possible thanks to the use of the latest 64-layer three-dimensional flash memory of 3D Nand Bics, made according to the 28-nanometer process, which we talked about in detail in previous materials on solid state drives. It was the increase in the density of the packaging of cells by almost 1.4 times compared to the previous generation of three-dimensional memory that helped us create a flash card of a record capacity by the standards of the modern market. Further development of promising technology will allow in the future to increase the number of layers in a three.Dimensional crystal to 128 and create even more advanced products that meet SDUC specifications.

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Which class of memory card to choose

SD card class-the main indicator affecting the speed of recording and reading data. On the body of each flash drive you will find the appropriate marking. In order not to indicate indicators of the type of MB/s, manufacturers simply indicate the class. Therefore, it is necessary to pay attention to it:

Speed ​​Class 2. These devices have a recording speed just above 2 MB/s. Now such memory cards are almost nowhere to be used, in the store you are unlikely to find them.

Speed ​​Class 4. Provides recording speed from 4 Mb/s. This is enough to shoot a video in HD format, but Full HD needs a faster flash drive.

Speed ​​Class 6. Record is carried out at speeds above 6 MB/s. This is a minimum class for shooting a video in Full HD. Such memory cards can be used in budget cameras and various gadgets.

Speed ​​Class 10. This is a fairly common class, it will be suitable for DVRs, mirror cameras, many Android devices. Recording speed. From 10 MB/s.

U1 (UHS Speed ​​Class 1). According to speed indicators, these flash drives are identical to the Class 10 drives (from 10 MB/s). UHS Speed ​​class cards are used more often than usual Speed ​​Class.

U3 (UHS Speed ​​Class 3). This class of flash drives appeared due to the widespread distribution of devices that record video in 4K format. Data recording speed. From 30 MB/s.

Uhs i. Such memory cards have the speed of recording and reading from 104 MB/s.

UHS II. Recording/reading speed. About 312 MB/s.

UHS-III. The latter current of the speed class of flash drives, capable of issuing a record 624 MB/s.

The number 10 circled in the circle indicates that the flash drive meets the standard Speed ​​Class 10 by the speed/reading speed (from 10 MB/s).

What does UHS mean?

Another information about the memory card that can catch your eye is UHS-1- or UHS-3-compensation. Such Microsd memory cards began to appear in 2009. In theory, the UHS card can maintain data transfer speed up to 321 MB/C, however, it is worth focusing on the minimum speed: 10 MB/s for UHS-1 and 30 MB/s for UHS-3. In fact, if you plan to use a card in a smartphone, you should not focus on this, smartphones do not support UHS.

Format for formatting a memory card on Android

By default, Android devices are able to read information from a memory card in only a few formats, while other types of file system will be ignored. You can find out about support right while using standard formatting tools from the second section of the article. Over, if the flash drive is used for certain purposes, you should definitely study the advantages of each supported format.

Currently, Android phones are capable of working with a memory card in one of the four main formats also supported by most other devices, including PC. These types of file system include:

Each format allows you to store almost any files, but has a number of advantages and restrictions.

This type of file system is the most obsolete and is currently practically not used on devices. In particular, this is due to the volume of stored files limited to no more than 2 GB, insufficient even for storing graphics. Therefore, if the size of the flash drive exceeds the indicated value, you will not be able to use it at least.

Despite the shortcomings, if the drive has a smaller volume than 2 GB and is used to store a small amount of information, you can choose the FAT format. However, before that, still pay attention to the next type of file system.

This format is an improved version of the previous option and is the most popular not only among users of mobile devices, but also as a type of file system for USB drives. If you format the USB flash drive in this format, support will be guaranteed on both smartphone and computers and other multimedia devices.

Watch This Before you Buy MicroSD Cards. Microsd Explained in Detail ������

The total volume of the drive for access to the format is not limited and can reach more than 100 GB, but the size of each processed file individually should not exceed 4 GB. This is a significant amount of data, and on phones such files are rare. However, there is still a probability of problems, for example, while maintaining cache or video files, each of which can take significantly more space in memory.

The penultimate type of file system available on the Android platform is Exfat, which does not have restrictions inherent in previous formats. It is this option that should be chosen for a large memory card and for the purpose of making a USB flash drive the main storage of information, including a system cache and multimedia.

The only problem associated with Exfat is compatibility. This format can have a number of problems with supporting some multimedia devices and old smartphone models. At the same time, on modern devices, the file system will process information at the highest possible speed.

For PC users, this format is the most famous, since it is this type of file system that is used on the Windows disk. The main advantages of NTFS are the absence of restrictions on file dimensions, the volume of the drive, the speed of information processing and in reliability.

As in the case of Exfat, the NTFS format is not supported by all devices, which may well become the main problem. It should only be chosen if the device can surely read information from such a flash drive.

Data transmission speed suffers

There are a huge number of SD cards, all of which have completely different levels of performance. If you use a low.Quality card, you will be disappointed with delays and frizes when working. This is true if you install a large number of applications on your SD card. Of course, if you plan to store only photos, documents and videos on the card, almost any card will suit you. Otherwise, do not skimp on this useful accessory.

Why the memory card doesn’t work

The only plus that I see in using a memory card for a smartphone is the opportunity to change it on the go. For example on vacation. You can shoot the video on it as soon as it ends, insert a new one, and then easily and quickly through the cartrider throw photos and videos to the computer. This function is useful. That is why I am not against the card for the card in the smartphone. I don’t want to use the removable memory as the main.

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I had such a memory card broke and stopped working. I don’t know what happened to her, but in the end I lost enough valuable photos. In fairness, that card was “noname”, and I bought it in a souvenir kiosk at one of the ski resorts. Therefore, her breakdown is not surprising. There can be many reasons for the failure of the memory card, from the assembly defect to problems with the file system and physical damage. The main thing is that in the end it does not work, and you lose data. I already told what to do if the cards are not seen by a smartphone. In some cases there are a chance to revive her, but they are not so great.

One of the readers in the Комментарии и мнения владельцев confirmed that you should not wait for great reliability from memory cards

How to choose a microsd for a phone

To choose the right memory card, you should focus on such characteristics:

In addition, the technologies that your smartphone support are also important: not every device will be able to recognize and take a microsd with a volume of 64 GB and above. Consider these features in more detail.

Manufacturers of memory cards

The rule “expensive does not always mean qualitatively” also applies to memory cards. However, as practice shows, the acquisition of an SD card from an eminent brand reduces the likelihood of running into marriage or various kinds of compatibility problems. The main players in this market are Samsung, Sandisk, Kingston and Transcend. Briefly consider their features.

Samsung Korean Corporation produces different types of household electronics, including memory cards. It can be called a newcomer in this market (issues SD cards since 2014), but despite this, the products are famous for reliability and quality.

Samsung Microsd are produced in the Standard, EVO and Pro series (in the last two there are improved options with the “” “”), for the convenience of users are marked with different colors. Of course, options for different classes, capacities and standards are available. The characteristics can be found on the official website.

There were also no shortcomings, and the main one is the price. Samsung memory cards cost 1.5, or even 2 times more expensive than competitors. In addition, sometimes cards of the Korean corporation are not recognized by some smartphones.

Sandisk This company founded SD and Microsd standards, so all the latest developments in this area are authorship of its employees. Sandisk today is a leader in production volumes and an affordable choice of cards.

The assortment of Sandisk is really extensive. From those who have already become familiar to 32 GB memory cards to the seemingly incredible cards of 400 GB. Naturally, there are different specifications for different needs.

As in the case of Samsung, Sandisk cards may seem too expensive for the average user. However, this manufacturer has established itself as the most reliable of all existing.

Kingston This American company (the full name of Kingston Technology) is the second in the world for the production of USB drives, and the third-on memory cards. Kingston products are usually considered as a more affordable alternative to Sandisk solutions, and in some cases even surpasses the latter.

The lineup of Kingston memory cards is constantly updated, offering new standards and volumes.

In technological terms, however, Kingston is in a catch.Up position, so this can be attributed to the disadvantages of the cards of this company.

choose, right, memory, card

TRANSCEND Taiwanese giant makes many solutions for storing digital data, and became one of the first Asian manufacturers who have mastered the memory cards market. In addition, in the open spaces of the CIS Microsd, this manufacturer is very popular due to loyal price policy.

It is curious that the transcendence provides a lifelong guarantee for their products (with some reservations, of course). The choice of this very product is very, very rich.

Alas, the main drawback of memory cards from this manufacturer is low reliability, in comparison with the brands mentioned above.

We also note that there are many other companies that produce microsd on the market, however, choosing their products, you should be careful: there is a risk of running into a product of dubious quality that will not work out and weeks.

Memory card volume

The most common volumes of memory cards today are 16, 32 and 64 GB. Of course, cards of smaller capacity are also present, as well as incredible Microsd at 1 TB, but the former gradually lose relevance, and the latter are still too expensive and compatible only with some devices.

  • The 16 GB card is suitable for users whose smartphones have capacious internal memory, and Microsd is needed only as an addition to important files.
  • 32 GB memory cards are enough for all needs: both films, a music library in Lossy and photos, as well as a cache from games or moved applications will fit on it.
  • Microsd with a capacity of 64 GB and above you should choose lovers to listen to music in Lossless format or record a large-format video.

Note! For large volume drives, support from your smartphone is also required, so before buying, be sure to read the specifications of the device!

choose, right, memory, card

Memory card standard

Most modern memory cards work according to SDHC and SDXC standards, which deciphens as SD High Capacy and SD Extnded Capacy, respectively. In the first standard, the maximum volume of cards is 32 GB, in the second. 2 TB. To find out which standard Microsd is very simple. It is marked on its case. SDHC standard was and remains dominant on most smartphones. SDXC is now mainly supported by expensive flagship devices, although there is a tendency to the emergence of this technology and on devices of the middle and lower price range.

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