Modern microSD memory card

Today the volumes of information are constantly growing. People need reliable data stores, where you can easily and quickly put large amounts of information. Similar requirements are faced by engineers from leading companies who are constantly trying to find an answer to this question.

More precisely, the answer is already found, and the work is being done to improve what is already available. The most common now is flash memory, it is used everywhere. Although traditional hard drives are still relevant, flash drives continue to advance in all directions of the market. Now the microSD memory card is used almost in all devices, "flash drives" have almost completely replaced the DVD-RW and other recordable discs.

Now the producers have stopped paying attention to the technology of compact discs, as it was before. Because the demand is getting lower. The only exception is the ability to record video in high definition, for this use Blue-Ray media. Otherwise, the microSD memory card can easily perform all other tasks.

The list of devices is almost unlimited, ranging from mobile phones and modern smartphones, and ending with various specialized and narrow-band devices, for example, navigators.

The microSD memory card is also used in many cameras, including professional SLR cameras that require a large amount of storage for high-resolution pictures. Memory cards are developed taking into account these requirements.

History of creation

History, as in most cases with data storage devices, began with the adoption of a single standard. To do this, it was necessary to unite the efforts of several large companies that had to agree on this.

In 1999, the Secure Digital standard was adopted, and the first samples were supplied with its own controller with mechanical protection against illegal reading and writing of information. Data protection was at that time one of the basic requirements.

The SD standard of the first generation allowed to create cards up to 2 GB. At the time the standard appeared, this was quite enough. The upgraded version, which received the designation SD 1.1, allowed to create a volume of up to 4 GB. However, this quickly became inadequate, so the SDHC standard appeared up to 32 GB. Now the fundamentally new level - SDXC, allows creating memory cards, the volume of which can reach 2 Terabytes.

Specifications

Despite some common features, a modern microSD memory card Is significantly different from the one that was more than 10 years ago. They are united only by a single standard, adopted as a basis.

SDHC cards are actively used, which differ from each other in classes. The lowest class is the second, it provides a write speed of up to 2 MB / sec. And the highest class of cards is SD Class 10, it can record information fast enough, up to 10 MB / sec. However, this is not enough for modern devices, so the manufacturers went further. For example, a modern video camera that shoots video in high definition needs a memory card with a recording speed of at least 24 MB / sec.

Such large volumes somewhat complicate the formatting of the memory card, although this is usually not required. However, the higher the class, the higher the speed of working with the card. In some cases, they are more reliable, so the question of how to restore a memory card simply does not arise. However, the new standards solve problems not only with the volume and speed of work, but also with the reliability of this data carrier, which is used in almost all devices of the modern type. In this case, we are talking about the joint work of manufacturers of technology and the creators of memory cards.