SD Card vs SDHC: Key Differences, Compatibility & Which to Buy
SD Card caps at 2 GB and uses the FAT12/16 file system; SDHC (Secure Digital High Capacity) spans 4–32 GB and runs on FAT32. The tiny logo—plain “SD” versus “SDHC”—is the only visual hint that two cards with identical dimensions are technically different generations. People grab whichever card looks right in the shop, then panic…