Seagate STAC1500100 FreeAgent GoFlex 1.5TB USB 2.0 External Hard Drive for $79.99 shipped after code EMCNBHB46.  Here is a screenshot for your reference.  It works both vertical and horizontal drive orientation and can be upgraded to a faster interface with a GoFlex Desk desktop adapters.  Most places have this Seagate FreeAgent GoFlex 1.5TB drive for about $89 and more.