Hitachi Touro Mobile MX3 1TB external hard drive (6.4 cm (2.5 inches), 5400rpm, 12ms, 8MB Cache, USB 3.0) Black (Personal Computers)
Currently have 5 mobile HDs each extra from another manufacturer (Intenso, Iomega, Verbatim, WD, Hitachi) ... not the cheapest but the fastest HD, much in use, far top!