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PRO 2003 4 GB (not to scale) Slim and narrow (50 mm × 21.5 mm × 2.8 mm), swifter, optional DRM, up to 4 GB Duo 2003 128 MB Compact (31 mm × 20 mm × 1.6 mm), optional DRM, up to 128 MB PRO Duo 2002–2006 32 GB Compact (31 mm × 20 mm × 1.6 mm), optional DRM, up to 32 GB PRO-HG Duo 2007–2008 32 GB
Samsung Electronics [33] South Korea Formerly, but sold that business to Seagate [34] Yes Yes No Yes SanDisk: United States No Formerly, through a joint venture with Toshiba Formerly, now a brand of WD: No Formerly, now a brand of WD: Seagate Technology [35] United States and Ireland Yes Yes, through stake in Kioxia: Yes No
The endurance of an SSD is typically listed on its datasheet in one of two forms: either n DW/D (n drive writes per day) or m TBW (maximum terabytes written), abbreviated TBW. [43] For example, a Samsung 970 EVO NVMe M.2 SSD (2018) with 1 TB of capacity has an endurance rating of 600 TBW. [44]
SanDisk co-founder Eli Harari developed the Floating Gate EEPROM which proved the practicality, reliability and endurance of semiconductor-based data storage. [7] In 1991, SanDisk produced the first flash-based solid-state drive (SSD) in a 2.5-inch hard disk drive form factor for IBM with a 20 MB capacity priced at about $1,000. [8]
SanDisk X4 flash memory cards, introduced in 2009, was one of the first products based on NAND memory that stores 4 bits per cell, commonly referred to as quad-level-cell (QLC), using 16 discrete charge levels (states) in each individual transistor. The QLC chips used in these memory cards were manufactured by Toshiba, SanDisk and SK Hynix. [30 ...
Samsung Pro 64 GB microSDXC original (left) and counterfeit (right): The counterfeit claims to have 64 GB in capacity, but only 8 GB (Class 4 speed) are usable: When trying to write more than 8 GB, data loss occurs. Also used for SanDisk 64 GB fakes.