SD cards, demystified: How to decipher the confusing jumble of specs
SD cards and microSD cards have a lot of their own unique terms and specifications. It will all make sense once we break it ...
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microSDHC - definition
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).