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  2. Comparison of memory cards - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_memory_cards

    Packages the flash memory, currently soldered in shipping smartphones, into a removable card form factor. Uses the SCSI command set including queuing. The electrical interface makes use of differential signaling , which enables high bus speeds and robustness under noisy conditions and reduced pin count (compared to parallel bus alternatives ...

  3. SD card - Wikipedia

    en.wikipedia.org/wiki/SD_card

    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.

  4. CFexpress - Wikipedia

    en.wikipedia.org/wiki/CFexpress

    The cards have a XQD form factor and use two PCIe 3.0 lanes. They come in 32 GB, 64 GB, 128 GB and 256 GB capacities. More details on Delkin's CFexpress cards were revealed in February 2018. [9] [10] The cards should be able to be read from and written to with respectively up to 1.6 GB/s and up to 1.0 GB/s benchmarked with CrystalDiskMark 5.2.1 ...

  5. Universal Flash Storage - Wikipedia

    en.wikipedia.org/wiki/Universal_Flash_Storage

    UFS is positioned as a replacement for eMMCs and SD cards. The electrical interface for UFS uses the M-PHY , [ 6 ] developed by the MIPI Alliance , a high-speed serial interface targeting 2.9 Gbit/s per lane with up-scalability to 5.8 Gbit/s per lane.

  6. MultiMediaCard - Wikipedia

    en.wikipedia.org/wiki/MultiMediaCard

    The card is composed of two detachable parts, much like a microSD card with an SD adapter. The small memory card fits directly in a USB port and has MMC-compatible electrical contacts. With an included electromechanical adapter, it can also fit in traditional MMC and SD card readers.

  7. CompactFlash - Wikipedia

    en.wikipedia.org/wiki/CompactFlash

    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.