Shop through a wide selection of USB flash drives at Inter-Warehouse.com. USB flash drives are data storage devices that consists of flash memory with an integrated Universal Serial Bus (USB) interface. Flash drives consist of a small printed circuit board and a USB connector, insulated and protected inside a case. USB flash drives are typically removable and rewritable, and generally are lightweight (1 oz-30 g). USB flash drives range in capacity and reach terabytes in size. USB flash drives are supported natively by modern operating systems such as Windows, macOS, Linux, and other Unix-like systems, as well as many BIOS boot ROMs.