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A flash drive (also thumb drive, memory stick, and pen drive/pendrive) [1] [note 1] is a data storage device that includes flash memory with an integrated USB interface. A typical USB drive is removable, rewritable, and smaller than an optical disc , and usually weighs less than 30 g (1 oz).
While the storage capacity was limited and the price high (around $1,000), this marked the beginning of a transition to flash memory as an alternative to traditional hard drives. [ 136 ] In the 1990s, new manufacturers of flash memory drives emerged, including STEC, Inc. , [ 137 ] M-Systems , [ 138 ] [ 139 ] and BiTMICRO .
Shelf life Anode Electrolyte Cathode Cutoff ... 2,500 [55] –12,000 to 80% capacity [63] Lithium manganese oxide: 90 ... Memory Cycles Times Temperature Weight NiCd:
Shelf life is the recommended maximum time for which products or fresh (harvested) produce can be stored, during which the defined quality of a specified proportion of the goods remains acceptable under expected (or specified) conditions of distribution, storage and display.
Same build as miniSD but greater capacity and transfer speed, 4 GB to 32 GB. 8 GB is largest in early-2011 (not compatible with older host devices). microSDHC 2007
Molecular memory might be especially suited for primary storage. The theoretical storage capacity of molecular memory is 10 terabits per square inch (16 Gbit/mm 2). [34] Magnetic photoconductors store magnetic information, which can be modified by low-light illumination. [31] DNA stores information in DNA nucleotides. It was first done in 2012 ...
The magnetic medium passes across a semi-fixed head which reads or writes data. Typically, magnetic media has a maximum lifetime of about 50 years [3] although this assumes optimal storage conditions; life expectancy can decrease rapidly depending on storage conditions and the resilience and reliability of hardware components. magnetic tape reels
Non-volatile memory (NVM) or non-volatile storage is a type of computer memory that can retain stored information even after power is removed. In contrast, volatile memory needs constant power in order to retain data.