The microSDHC cards (HC as in High Capacity) upgrade the microSD standard. They have the same physical dimensions but offer higher capacities (4-16 GB) than the regular ones (64MB-2 GB).

MMC (which stands for "Multi Media Card") is one of the oldest formats and has been replaced by newer ones like SD, microSD and microSDHC. MMCmobile cards are based on the RS-MMC cards and share ...