The latest batch of WD external drives aimed at the Mac market come in 1TB, 2T2 and 3TB versions. THe WD My Book Studio features FireWire 800/400 and USB 2.0 interfaces.
When I insert a plug-in on a track , I got a broken interface . I can use most of them without their respective interfaces , but most complex like EQ10Q are pain to use without its interface . The GUI is broken with all plug-in use in Ardour and packed with Ubuntu-Studio 12.10 .
Ubuntu Studio, a multimedia editing / creation flavor of Ubuntu, has reached version 14.04 LTS (Trusty Tahr) and is now ready for download. Ubuntu Studio 14.04 (Trusty Tahr) has been released along with all the other flavors, like Kubuntu, Xubuntu, and Ubuntu GNOME, and it's sharing some of their features.
Fresh install of Ubuntu Studio 13.10... mounted on a 2 TB external usb 3.0 drive, I also have a 3 TB usb 3.0 attached to my HP Pavillion 500-046, AMD64, that I do dual boot with Windows 8.1, with UEFI "bios," & hard drives use GPT formatting (hope I said that correctly).