Memory cards are solid-state electronic flash memory data storage devices used with digital cameras, handheld and laptop computers, phones, music players, video game consoles and other electronics. They offer re-recordability, power-free storage, small form factor and rugged environmental specifications.

Flash cards have been suggested as a possible replacement for the floppy disk, but this has not happened, largely because of the lack of standardisation in the flash memory card market. USB Keydrives, which work on almost any computer with a USB port, are filling this role instead.

Name	Acronym	Form factor
CompactFlash I	CF-I	43 × 36 × 3.3mm
CompactFlash II	CF-II	43 × 36 × 5.5mm
SmartMedia Card	SMC	45 × 37 × 0.76mm
Memory Stick	MS	50.0 × 21.5 × 2.8mm
Multi Media Card	MMC	32 × 24 × 1.5mm
Secure Digital Card	SD	32 × 24 × 2.1mm
miniSD Card	miniSD	21.5 × 20 × 1.4mm
xD-Picture Card	xD	20 × 25 × 1.7mm

Since all sorts of EEPROM devices only allow a finite number of write cycles, some of these cards incorporate wear levelling algorithms to spread the wear and to avoid wearing out specific places which are often written to.

See also: keydrive.

de:Speicherkarte ja:メモリーカード