There have been discussions about the advisability of replacing an aging Time Capsule being used for Time Machine backups due to a flaw discovered in its internal hard drive. There are lots of cheap external drives available that can perform that function for many people in this situation. In my case, we use the Time Capsule for Time Machine backups for my iMac and my wife's MacBook Pro via our wifi network. Are there drives available that provide the same function at a similarly cheap price? And are they available locally? Or do I just plug a normal external drive into one of the ports on the Time Capsule and ignore the internal drive?