What is SD card?
Types of SD cards:
Most common SD card
32 x 24 millimeters, 2.1 millimeters thick
Mini SD card
20 x 21.5 millimeters, 1.4 millimeters thick
Micro SD card
15 x 11 millimeters, 1 millimeter thick
Different capacities of SD cards
It's not just the physical makeup of the card that's standardized. SD cards also come in different capacities.
- SD - Standard format with up to 2 GB per card, available in all three sizes, under $10
- SDHC - High-capacity format with 4 to 32 GB per card, available in all three sizes, $10 to $100
- SDXC - eXtended capacity format with 32 GB to 2 TB per card, available in the larger and micro sizes only, starting around $80