I bought the 2TB Time Capsule yesterday for backup. I have two MacBook Air's and an iMac that are sharing it for their backups. Initial backup using time machine on the first Air was 50GB and the other was 85GB. I haven't backed up the iMac yet but we have most of our files there so I am imagining at least 100GB. After the initial backup on my Air, it did an hourly backup and even though I hadn't downloaded anything or changed anything it was still 250MB. It seems that time machine wants to do an initial backup, weekly backup, daily backup and hourly backup. I am wondering with these settings how long it will take until my 2TB Time Capsule is full. (I understand that the time machine will start deleting old backups once it's full to make room for the new ones) My question, are all these backups every hour necessary or just overkill? Did you modify your time machine settings so it didn't backup so often?