Secure Digital (SD)
The Secure Digital (SD) format was introduced in August 1999 by the joint efforts of SanDisk, Panasonic, and Toshiba as an improvement over the MultiMediaCard (MMC) format. In the following years, the SD card became a broadly-adopted industry standard for digital cameras.
There are many cards with the same physical format but different markings such as SDHC (Secure Digital High Capacity), SDXC (Secure Digital eXtended Capacity), and SDUC (Secure Digital Ultra Capacity). All these formats can be read with the same card reader, and the only practical difference between these cards is their capacity and transfer speeds.
- Date: 1999
- Dimensions: 24mm × 32mm × 2.1mm
- Capacity: 1MB – 2TB
- See Full Archive
- See More Memory Formats