HD Movie Maker

SD Card

(Secure Digital Memory Card) The most popular flash memory card for digital camera and other mobile storage. Introduced in 1999 by Panasonic, Toshiba and SanDisk, cards up to 128GB are available with huge capacities planned for the future (see SDXC below).

SD Cards use the same 32x24mm form factor as the earlier MultiMediaCard (MMC), but are slightly thicker (2.1mm vs. 1.4mm), and SD Card readers accept both formats.

Fast Storage
Although SD Cards support encryption and content protection (the "Secure" in SD), they have been mostly used for regular storage due to their small size and fast transfer rate, which started out at 10 MB/sec and has steadily increased. SD uses NAND flash technology

SD High Capacity (SDHC)
Based on the SD Card Association 2.0 specification, SDHC cards do not work in SD devices, because SD uses the FAT16 file system, and SDHC uses FAT32. However, SDHC devices support both SDHC and SD Cards. SDHC cards also come in miniSDHC and microSDHC formats.

Source(s):
http://en.wikipedia.org