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SD card
Camera storage type
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Secure Digital, officially abbreviated as SD, is a proprietary, non-volatile, flash memory card format the SD Association developed for use in portable devices.
The standard was introduced in August 1999 by SanDisk, Panasonic and Toshiba as an... Wikipedia
Block size: Variable
Capacity: SD: Up to 2 GB; SDHC: over 2 GB to 32 GB; SDXC: over 32 GB to 2 TB; SDUC: over 2 TB to 128 TB
Extended from: MultiMediaCard
Released: August 1999
Standard: SD Standard
Usage: Portable devices, such as digital cameras and mobile phones (including most smartphones)
Weight: Standard: ~2 g; Mini: ~800 mg; Micro: ~250 mg