Not the biggest external HDD at 300GB, and possibly discontinued, but a bargain nonetheless as it includes a Promise PCI card with real e-sata controller and two e-sata ports - not a dumb bracket that connects to an internal sata controller. This is e-sata only - no USB2.0. If you want to connect to more than one PC you'll need an e-sata port on each one. Solution: buy two - I did!
This HDD was well received when posted earlier this year by demonblade at £108.30.
Tip: if after installation you can see the HDD in Windows Device Manager but not in Windows Explorer, use the Disk Wizard on the CD: it will fix the installation and allows easy reformatting from FAT32 to NTFS.