The product is a set of three Samsung HD401LJ internal desktop drives, each with a storage capacity of 400GB and a rotation speed of 7200 RPM. These drives are designed for use with PCs and are compatible with SATA II interfaces. The form factor of each drive is 3.5 inches, and they come in a silver colour. All of the Samsung drives has a model number of HD401LJ and a cache size of 16M, x2 of the Samsung units have a Crystal Lite Caution warning, despite being functional and x1 Samsung has a Crystal Lite status of Good. The package also includes one Seagate Barracuda 1TB drive again functional with a caution label attached to it. ***NB Please note I am in UK and the currency is GBP ponds NOT US dollars, has developed a bug and I can't get it to stop with dollars. Price is in US dollars, because of an bug price is UK pounds £30