While I-O Data only has some new drive enclosures for sale, Buffalo has some actual external storage devices to offer, or at least will soon enough.
The drives are advertised as the HD-PUSU3 line. They measure 79 x 115 x 8.8 mm / 3.11 x 4.52 x 0.34 inches and weigh 140 grams / 0.30 pounds.
Even in that thin form factor, Buffalo still managed to cram a SATA 6.0 Gbps controller and the wiring to the USB 3.0 connector used to link to the PC, or whatever other device is used as a host.
Also, the drives ship with the Turbo PC EX2 software, which boost data speed. Installers for both Windows and Mac are included in the bundle.
Buffalo will have red (HD-PUS500U3-R), black (HD-PUS500U3-B) and silver (HD-PUS500U3-S) drives up for sale from February, for 11,655¥ ($132 / 98.97 Euro).