The Archos ARCDisk is a portable 20gig USB 2.0 hard drive that has a footprint smaller than that of a floppy disk. At 76 mm x 77 mm x 8.8 mm it can fit in a shirt pocket or purse with ease.
The tiny Archos ARCDisk measures 76 mm x 77 mm x 8.8 mm
It weighs only 2.7 ounces and since it can be powered by the USB port, requires no external power. The tiny hard drive has a 2mb cache and rotates at 4200 rpm. It is compatible with Windows 98SE, ME, 2000 and XP.