Is there a difference between SD and SDHC memory cards?
Nov. 7, 2011 at 14:15
SD is really the form factor.
SDHC is the same form factor but HC means High Capacity, i.e. anything above 2Gb. Early devices can only use SD (up to 2Gb) so SDHC was introduced to break this barrier. SD cards can be used in SDHC devices, but not the other way round. As 4Gb isn't exactly HUGE nowadays most people don't bother with the HC tag so just refer to SD, as who would really want to buy a 2Gb card nowadays unless it was for an old Nikon D50 DSLR (i've got one).....
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