I've run a WHS 2011 as the central server for my home, but its inability to properly handle TimeMachine without unstable hacks has lead me to buy a Mac Mini expressly for that purpose. However, obviously, the 500gb internal HDD is far from enough. What's the best way to expand the storage options? USB? Firewire? Thunderbolt? I have a lot of HDDs at home, so I don't need more external drives. Just enclosure will be great.