SD card
History and Evolution
Introduced in 1999 as a collaboration between SanDisk, Panasonic, and Toshiba, the SD memory card was developed as an improvement over the MultiMediaCard (MMC). With digital rights management (DRM) features, SD aimed to compete with Sony’s Memory Stick format. The SD Association (SDA) was founded in 2000 to promote SD cards, leading to the introduction of various form factors like miniSD and microSD in the early 2000s.
Usage and Industry Impact
SD cards have become ubiquitous in digital cameras, mobile phones, and other portable electronic devices since their inception. The SD Association ensures compliance with specifications across a wide range of member companies. As an industry standard for storage, SD cards continue to evolve with advancements in capacity, speed, and security features.
Capacity and Form Factors
Secure Digital (SD) cards come in various families like SDSC, SDHC, SDXC, SDUC, and SDIO, each with different capacities and form factors. Ranging from 2GB to 128TB, these cards utilize different file systems and bus technologies to support increasing data speeds and storage capacities over the years. With the introduction of the SD Express interface, SD cards have continued to adapt to the growing demands of modern devices.