Put ladies and gentlemen, and keep hands and feet inside all the time. Will soon go on a wild path memory and will become quite thick.
SD, also known as Secure Digital was jointly established tech giants Panasonic, Toshiba and SanDisk, as a way to improve existing formats of portable memory cards. Quickly defeated rivals CompactFlash and MMC to become the industry standard for memory cards. Since the introduction in 1999. SD cards have evolved to encompass many different formats. They are classified in various ways: specifications, size, capacity, and speed class.
The SD card can be divided into three specifications: SD, SDHC or SDXC. SD is the original version and supports up to 2 GB. Secure Digital High Capacity / SDHC memory card is an enhanced version which can hold up to 32 GB. Secure Digital eXtended Capacity or SDXC boasts a maximum capacity of up to 2 TB. The latest version of SDXC card has been designed to handle 8K video. While all SD cards are physically identical, the host device SD does not support the later versions of the cards. However, previous versions of SD and SDHC cards can be used in SDXC slots, a concept known as backward compatibility.
The amount of SD memory cards: SD, miniSD or microSD. All dimensions can be defined as SD, SDHC and SDXC memory cards and both cards miniSD and microSD using adapter to fit standard SD card slots.
SD cards are also marked with their capacity. A 4GB card will hold twice more than the card is 2GB. Current standard capacity is 64 GB, however, they range from very limited (32MB) to very large (200GB). Unlike beliefs, the physical size of the card does not correspond with the volume. In fact most memory cards microSD, has the largest capacity.
The final difference is the speed class; the system of evaluation is used to determine how fast data is read or written to SD cards. Can be in the range of 2-class data recording with a speed of 2 MBIT / sec, up to class 90 video, write speeds of 90 MB / sec. This second is optimal for 8K video.
Down the rabbit hole
SD memory cards are nonvolatile, which means data is not destroyed after disconnecting the power source. This feature makes them ideal for portable electronic devices: video cameras, web cameras, stock, smartphones and e-books. MicroSD cards gained popularity in the world of smartphones due to their small size. Action web Cams such as GoPro and drone, it also uses microSD cards as the standard format for memory cards.
Some manufacturers of microSD cards beckon the buyer additional features of the physical map. Important attributes, they are detailed, if the card is waterproof, shockproof or magnetic. These functions can tempt any consumer, nevertheless worthy for those working with a regular camera such as the GoPro.
New models of microSD memory cards can also run applications . Frustrated Android user who has limited space for storage in your phone, you can now decide to launch certain applications, in addition to a microSD card, creating more internal memory. It’s not ideal, because the application will run slower in most cases with external memory card.
Since most laptops now have built-in card reader SD, it is important to protect the microSD card adapter. Don’t think that is included in your purchase.
A brief history of SD cards
Secure Digital was established in 1999 by the SD Association: joint account of the companies Panasonic, Toshiba and SanDisk. It was proposed to establish, to fix technical problems, which fought CompactFlash (CF) and MMC; formats of memory cards available on the market. The SD Association has promised to come up with a better portable memory card format. Thus, they created the industry standard.
In 2000, the SD Association introduced the first version of the SD card. The model was proposed in 32 MB. By today’s standards it’s limited storage space-it’s ridiculous. Since that time, the task Syzyfy keeps up with modern high-definition TVs and includes in smartphones has led to the SDHC and SDXC formats, for processing large amounts of data.
In 2005, the world of smartphones demanded more memory, due to the smaller memory card. SD replied with a microSD card, compact enough to fit in smartphones, and simultaneously accommodate up to 128 MB. Of course, the amount of microSD cards has grown exponentially in the last decade. In 2015 was spent the microSD card that contains 200 GB of data. The numbers will only grow: we don’t know how high is the glass ceiling.