What is a Memory Card? - Explained

What-is-a-memory-card

1. What is a Memory Card?

Memory card is a type of a storage device which named by different names as flash card or memory cartridge. Memory card is an electronic equipment which does not have any mechanical parts inside but the NAND flash type electronic chips inside to store data electronically.

Memory cards are used wide range of applications in the world including cameras, smart phones, computers and etc...

2. History

Memory cards were known as PC Cards or PCMCIA in the old days, where it used only for commercial memory storage By the time when the PC Cards were introduced, they were much larger in size.

The current version of smaller cards were introduced in 1994 and named as CompactFlash, SmartMedia and Miniature card. With the increasing usage of the hand held devices, the usage of Memory cards began to increase and got more efficient where they requires less space to store more data.

3. Types of Memory Cards

There are wide range of memory cards manufactured and developed by different companies and by different technology companies to achieve different tasks and different applications.


NameAbbreviationForm Factor in mm
PC CardPCMCIA85.6 x 54 x 3.3
CompactFlash ICF-I43 x 36 x 3.3
CompactFlash IICF-II43 x 36 x 5.5
CFexpressCFX38.5 x 29.8 x 3.8
SmartMediaSM / SMC45 x 37 x 0.76
Memory StickMS50 x 21.5 x 2.8
Memory Stick DuoMSD31 x 20 x 1.6
Memory Stick PRO DuoMSPD31 x 20 x 1.6
Memory Stick PRO-HG DuoMSPDX31 x 20 x 1.6
Memory Stick Micro M2M215 x 12.5 x 1.2
Miniature CardN/A37 x 45 x 3.5
Multimedia CardMMC32 x 24 x 1.5
Reduced Size Multimedia CardRS-MMC16 x 24 x 1.5
MMCmicro CardMMCmicro12 x 14 x 1.1
P2 cardP2N/A
Secure Digital CardSD32 x 24 x 2.1
SxSSxSN/A
Universal Flash StorageUFSN/A
miniSD CardminiSD21.5 x 20 x 1.4
microSD CardmicroSD15 x 11 x 0.7
xD-Picture CardxD20 x 25 x 1.7
Intelligent StickiStick24 x 18 x 2.8
Serial Flash ModuleSFM45 x 15
u Carducard32 x 24 x 1
NT CardNT NT+44 x 24 x 2.5
XQD cardXQD38.5 x 29.8 x 3.8