I had set up my Time Machine to use Time Capsule for backups for both mine and my wife's iMacs (and my Macbook), Well, it was only a 500GB TC, and eventually we started running out of space, so I decided to change my iMac to use an external 2TB drive I have for backups instead of TC. When I was using teh TC for backups, it was making one bog file with an extension (my name).sparsebundle). But when I changed over and started using the TB external, it doesn't have a .sparsebundle file. Instead, it has a folder called something like bacckups.backupdb with a separate folder for each backup set. My NooB question is, why was it putting a ".sparsebundle" file when I was using TC as my backup drive, but now it's using just regular files? What's the difference and is one better than the other? Just curious.