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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 in 2009. [16] SD versions 4.0, v4.10 and v4.2 were introduced between 2011 and 2013.
Manufacturers may report best-case speeds and may report the card's fastest read speed, which is typically faster than the write speed. Some vendors, including Transcend and Kingston, report their cards' write speed. [114] When a card lists both a speed class and an "×" rating, the latter may be assumed a read speed only. [citation needed]
Same build as SD/SDHC/SDXC, but greater capacity and transfer speed. Standard goes up to 128 TB (not compatible with older host devices). SmartMedia: Toshiba: 3.3/5 V 1995 128 MB Very slim (45.0 mm × 37.0 mm × 0.76 mm), no wear leveling controller, up to 128 MB. This particular example shows the write protect sticker (the silver disc).
The SanDisk iXpand product family, including the iXpand Flash Drive and iXpand Base, is made specifically for use with the Apple iPhone and iPad. [84] [85] [86] The 400 GB SanDisk Ultra microSDXC UHS-I card was designed primarily for use in Android smartphones that include an expansion slot. [87] [88]
First SanDisk logo (1995–2007) Second SanDisk logo (2007–2024) SanDisk (originally Sundisk) was founded in 1988 by Eli Harari, Sanjay Mehrotra, and Jack Yuan. [5] In 1995, just before its initial public offering, SunDisk changed its name to SanDisk, to avoid confusion with Sun Microsystems, a prominent computer manufacturer at the time. [6]
For Blu-ray discs, 1× speed is defined as 36 megabits per second (Mbit/s), which is equal to 4.5 megabytes per second (MB/s). [7] However, as the minimum required data transfer rate for Blu-ray movie discs is 54 Mbit/s, the minimum speed for a Blu-ray drive intended for commercial movie playback should be 2×. The fastest Blu-ray speed is 16×.
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Standard SD UFS Card CFast XQD CFexpress; Version 3.0 4.0 6.0 7.0 [28]: 8.0 1.0 2.0 1.0 2.0 1.0 2.0 1.0 2.0 4.0 Launched 2010 Q2 2011 Q1 2017 Q1 2018 Q2 2020 Q1