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  2. Comparison of memory cards - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_memory_cards

    Same build as SD/SDHC, but greater capacity and transfer speed, 32 GB and higher. Standard goes up to 2 TB (not compatible with older host devices). microSDXC: 2009 2 TB [6] Same build as microSD/microSDHC, but greater capacity and transfer speed, 32 GB and higher. Standard goes up to 2 TB (not compatible with older host devices). SDUC: 2018

  3. SD card - Wikipedia

    en.wikipedia.org/wiki/SD_card

    A 64 GB microSDXC card from Raspberry Pi (with Speed Class 30, UHS-I, UHS Speed Class 3, Video Speed Class V30 and Application Performance Class 2 markings) Application Performance Class is a newly defined standard from the SD Specification 5.1 and 6.0 which not only define sequential Writing Speeds but also mandates a minimum IOPS for reading ...

  4. Memory card - Wikipedia

    en.wikipedia.org/wiki/Memory_card

    Secure Digital (SD Card), Secure Digital High-Speed, Secure Digital Plus/Xtra/etc (SD with USB connector) miniSD card; microSD card (aka Transflash, T-Flash, TF) SDHC; WiFi SD Cards (SD Card With WiFi Card Built in) Powered by Device. (Eye-Fi, WiFi SD, Flash Air) Nano Memory (NM) card; MU-Flash (Mu-Card) (Mu-Card Alliance of OMIA) C-Flash

  5. Optical storage media writing and reading speed - Wikipedia

    en.wikipedia.org/wiki/Optical_storage_media...

    For CDs, the 1× writing speed is equivalent to the 1× reading speed, which in turn represents the speed at which a piece of media can be read in its entirety, 74 minutes. Those 74 minutes come from the maximum playtime that the Red Book (audio CD standard) specifies for a digital audio CD (CD-DA); although now, most recordable CDs can hold 80 ...

  6. SD Association - Wikipedia

    en.wikipedia.org/wiki/SD_Association

    MicroSD specifications [13] were released in 2005 with SD v2.0 SD- High Capacity (SDHC), introducing memory cards with up to 32 GB of storage in 2006. [14] SD v3.0 brought Extended Capacity (SDXC) [ 15 ] specifications offering memory cards with up to 2 TB of storage and Ultra High Speed – bus transfer speeds of up to 104 megabytes per second ...

  7. MultiMediaCard - Wikipedia

    en.wikipedia.org/wiki/MultiMediaCard

    The version 4.x of the MMC standard, introduced in 2005, introduced two significant changes to compete against SD cards: (1) the ability to run at higher speeds (26 MHz and 52 MHz) than the original MMC (20 MHz) or SD (25 MHz, 50 MHz), and (2) a four- or eight-bit-wide data bus.