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2. Optical disc - Wikipedia

   en.wikipedia.org/wiki/Optical_disc

   File operations of traditional mass storage devices such as flash drives, memory cards and hard drives can be simulated using a UDF live file system. For computer data backup and physical data transfer, optical discs such as CDs and DVDs are gradually being replaced with faster, smaller solid-state devices, especially the USB flash drive. [8]

3. 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 ...

4. Flash memory controller - Wikipedia

   en.wikipedia.org/wiki/Flash_memory_controller

   Block mapping can has smaller metadata size and lower cost, but it has lower performance, and its usually used on USB flash drives. On page mapping FTL implementations, the ratio of FTL metadata size and storage capacity is usually 1:1000, for example, a 1TB flash storage device may has 1GB of FTL metadata.

5. External storage - Wikipedia

   en.wikipedia.org/wiki/External_storage

   Such storage devices may refer to removable media (e.g. punched paper, magnetic tape, floppy disk and optical disc), compact flash drives (USB flash drive and memory card), portable storage devices (external solid-state drive and enclosured hard disk drive), or network-attached storage.

6. USB flash drive - Wikipedia

   en.wikipedia.org/wiki/USB_flash_drive

   By July 2016, flash drives with 8 to 256 GB capacity were sold more frequently than those with capacities between 512 GB and 1 TB. [4] [5] In 2017, Kingston Technology announced the release of a 2-TB flash drive. [26] In 2018, SanDisk announced a 1 TB USB-C flash drive, the smallest of its kind. [27]

7. Lexar - Wikipedia

   en.wikipedia.org/wiki/Lexar

   USB FlashCard is a flash memory card format developed by Lexar, and announced on December 13, 2004. [ 15 ] There is a wide range of existing memory card formats such as SD , xD , and CompactFlash ; the major advantage of USB FlashCard is that the cards are in fact standard USB flash drives . [ 16 ]