What is an SD card?

Our computerized world is replete with all sorts of gadgets and accessories to them. Therefore, not everyone knows what an SD card is, why it is needed and how many varieties exist.

Memory card and its features

A memory card is small and thin enoughplate, with a built-in flash memory module, which is nonvolatile. And this means that the information on it is preserved even when it is extracted from the device. Information can be deleted and overwritten many times. The service life of the memory card is estimated for decades. On some of them, information can be protected by certain methods.

Types of memory cards

At the moment on the market you can find many different types of memory cards. In this article we will focus on the most popular types.

SD (Secure Digital) is the most popularkind of memory cards. It is used in many cameras, old players, tablets, video cameras, handheld computers and communicators. It can be purchased in all computer stores, communication stores for a fairly small price. The maximum amount of such a card is 4GB.

SDHC cards include all SD memory cards,the volume of which is more than 4GB. This type of cards is characterized by faster operation speed. Their maximum capacity is 32GB. It is more preferable to purchase SDHC cards, but it should be borne in mind that some older devices do not work with them.

SDXC is a new standard thathas not yet been widely disseminated. Such cards are huge capacity, which can leave 2 terabytes and extremely high data writing speed. Their price is high enough, and on sale they are not very common. In addition, this format is still supported by a few devices.

MiniSD is an analog SD, but smaller. Now it is practically not used, because the microSD format replaced it, so it is problematic and expensive to buy.

MicroSD differs from SD in small dimensions, andthey are cheaper. True, it has one drawback - it's easy to lose, but on the other hand, it is very convenient, as it fits into any connector on any device. Now you know what an SD memory card is, and what varieties can be purchased, and it is unlikely that you will lose interest in choosing it.