Actually, newegg made it easy… Cavalry 2-Bay USB 2.0 Dock & Two (2) 7200 RPM 16MB 1TB SATA Hard Drives - Newegg.com
A dock and 2 1TB drives. So 2TB of storage that can be hot swapped with other drive whenever you want. Fill one up, buy another drive and pull the full one out and put the new one in. Need stuff off the full one? Just plug it back into the dock. Makes moving lots of data around VERY easy.