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32 GB [4] 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 32 GB [4] Same build as microSD but greater capacity and transfer speed, 4 GB to 32 GB. [5] (not compatible with older host devices) SDXC: 2009 1 TB
At the same show, SanDisk and Sony also announced a comparable Memory Stick XC variant with the same 2 TB [b] maximum as SDXC, [25] and Panasonic announced plans to produce 64 GB SDXC cards. [26] On March 6, Pretec introduced the first SDXC card, [27] a 32 GB card with a read/write speed of 400 Mbit/s.
Cards today far exceed that by using one of two format extensions: SDHC, which maxes out at 32 GB, or SDXC, which maxes out at 2 TB. SDXC support is more future-proof, but SDHC cards are still common and inexpensive. Support for the newer formats is important, because memory card slots are not usually forward compatible. [40]
The basis for memory card technology is flash memory. [2] It was invented by Fujio Masuoka at Toshiba in 1980 [3] [4] and commercialized by Toshiba in 1987. [5] [6] The development of memory cards was driven in the 1980s by the need for an alternative to floppy disk drives that had lower power consumption, had less weight and occupied less ...
The card is composed of two detachable parts, much like a microSD card with an SD adapter. The small memory card fits directly in a USB port and has MMC-compatible electrical contacts. With an included electromechanical adapter, it can also fit in traditional MMC and SD card readers.
The HDC-TM300 is a new departure and features a built-in 32 GB of Flash memory instead of a hard disc drive (The 'TM' in the model number stands for 'Twin Memory' as this model takes FLASH memory cards as well). This model has been slightly restyled compared with its stable mate. The HDC-SD300 records video to a SD FLASH card only.