The term, embedded flash drive (EFD) has cropped up more in technology lingo as consumers need expanded storage options for their cell phones, laptops and other memory devices. What’s more is that while embedded flash drives share a common thread with the custom USB flash drive as we know it, the two are vastly different. Like USB flash drives, EFDs utilize NAND flash, a type of non-volatile memory that is made into the form of a silicon chip.