Own a mid-2011 iMac and already starting to feel the squeeze with your internal storage? The wizards over at iFixit have discovered that last year’s 21.5-inch and 27-inch iMac is capable of adding a second internal hard drive -- and is now offering the tools to do it yourself.
The Vantec NexStar can connect two 2.5-inch or 3.5-inch hard drives at
once. That’s very useful if you want to transfer files between two
external drives. However, you’ll have to connect the NexStar using only
USB 2.0 or eSATA, there’s no FireWire port. The already-slow USB
pipeline gets overloaded while simultaneously reading one drive and
writing to another, so be prepared to wait while the drives do their