Discussion 3

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1) Using course resources and the Internet, please explain the following Flash Memory Cards: a. Secure Digital (SD) A secure digital card, or an SD card, is flash memory that is utilized for “ high-capacity memory and various portable devices” (Lelii, 2017). Comparable to the size of a postage stamp, these cards are small, lightweight and does not require a power source in order to store its data. You can often find SD cards in cell phones, e-books, cameras, and GPS systems. b. Compact Flash (CF) Developed by SanDisk in 1994, a compact flash memory card is a popular choice for cameras (Brown, 2017). As a removeable flash memory card, the compact flash utilizes NOR or NAND memory to create nonvolatile memory, or to allow for data storage to happen when power is off or removed. c. Memory Stick (MS) The MS card was introduced by Sony in 1999 and was designed for Sony products such as digital cameras (Hope, 2023). Memory Sticks' capacity ranges in sizes from 4 MB to 256 GB, with a theoretical maximum capacity of 2 TB and utilizes random-access memory. d. MultiMediaCard (MMC) Functioning as yet another form for external data storage, a MultiMediaCard works well for transferring data and information from one media platform to another. This works similarly to, and well with, secure digital cards that we previously discussed. They are similarly often the size of a postage stamp and can handle up to 2 GB of data storage with transfer speeds of 2.5 MB/s. They work well with digital content holding devices such as eBooks or videos because they can encrypt their data. e. xD-Picture Card (xD) The extreme digital picture card is a flash memory card that was often used in earlier version digital cameras. Introduced by Fiji in 2002, these were the smallest flash memory cards on the market for a 1 year (PCMag, 2020). These were “low-power, high-speed data transfer up to 5 MB/s in capacities to 512MB” (PCMag, 2020). f. SmartMedia (SM) Introduced by Toshiba in 1995, this early version of an ultra-compact flash memory card was popular for a bit but had limited sizing issues. Never reaching beyond 128MB, these small chip cards required no assembly and came in two versions, a 3.3 volt and a 5 volt. By today’s standard, this product is now obsolete and is not produced anymore. Emma References:

Brown, R. (2017, May 26). What is CompactFlash card (CF card)?: Definition from TechTarget . TechTarget. https://www.techtarget.com/searchstorage/definition/CompactFlash-card Hope, C. (2023, September 12). What is a memory stick? . Computer Hope. https://www.computerhope.com/jargon/m/memstick.htm Lelii, S. (2017, January 11). What is Secure Digital Card (SD card)? . TechTarget. https://www.techtarget.com/searchstorage/definition/Secure-Digital-card PCMag. (2020). Definition of XD picture card . PCMAG. https://www.pcmag.com/encyclopedia/term/xd-picture-card

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