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Unlocked and locked SD cards Sony 64 GB SF-M Tough Series UHS-II SDXC Memory Card is one of the few cards in the market without a sliding tab on the write protect notch. Most full-size SD cards have a "mechanical write protect switch" allowing the user to advise the host computer that the user wants the device to be treated as read-only.
The Type M+ card, first released in April 2008, [16] offers data rates 1.5 times that of Type M cards. As of 2008, cards are available only in 1 and 2 GB capacities. Olympus says that its xD cards support special "picture effects" when used in some Olympus cameras, though these software features are not intrinsically hardware-dependent.
Eye-Fi was a company based in Mountain View, California, that produced SD memory cards with Wi-Fi capabilities. Using an Eye-Fi card inside a digital camera, one could wirelessly and automatically upload digital photos to a local computer or a mobile device such as a smartphone or tablet computer. The company ceased business in 2016.
microSD→miniSD→SD→CF. The following chart gives details on availability of adapters to put a given card (horizontal) in a given slot or device (vertical). This table does not take into account protocol issues in communicating with the device. Following labels are used: + (native) – A slot is native for such card.
SD card; Metadata. This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
CompactFlash IDE (ATA) emulation speed is usually specified in "x" ratings, e.g. 8x, 20x, 133x. This is the same system used for CD-ROMs and indicates the maximum transfer rate in the form of a multiplier based on the original audio CD data transfer rate, which is 150 kB/s.
The majority of cards for separate cameras are Secure Digital (SD) format, or the older CompactFlash (CF) format; other formats are rare. XQD card format was the last new form of card, targeted at high-definition camcorders and high-resolution digital photo cameras.
Typically, SmartMedia cards were used as storage for portable devices, in a form that could easily be removed for access by a PC. For example, pictures taken with a digital camera would be stored as image files on a SmartMedia card. A user could copy the images to a computer with a SmartMedia reader.