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TimeMachine might be the easiest way to back things up on a regular basis. You'll need any old external drive and a few clicks of the mouse. If you have more specific needs, feel free to edit your qu …

(bottom) to the oldest backup (top). … If you delete a file or a backup there, it prompts you for a password so you are sure to want it gone before it gets erased. …

a backup, old backups are permanently deleted. … backup that then becomes that day's backup. …

Yu can also get these files from time machine or other backup (offsite or local) Even after swapping the old drive, you can still start iTunes pointing to the old backup library and run / restore or export …

You can then go back to the first and this lets you have more history before the oldest backup is reclaimed due to space running out. An alternative is to use Mac OS X built in RAID functionality. … You would then have one large backup and since Time Machine won't be saving two copies of many files - you will get much longer time for storage using a RAID than the first method of using the drives sequentially …

Once the drive fills, TimeMachine will delete enough backups to start the current backup and then warn you that files have been deleted. …

The backup isn't bootable. The backup doesn't record differences inside a file. Large (database) files with tiny changes make each incremental save longer and move more data. … Weekly backups can be deleted if there isn't enough space to contain the estimated size of the next backup. …

fragments of files or data that resembles file entries / inodes and filter those results for potential files modified in the time range of the rm. compare the current directory structure with a recent backup … (tmutil compare would be an ideal Lion tool, but you can use BackupLoupe or others if your backup is TimeMachine) …

You could presumably delete this from the TM side, but I would remove the boot copy as marginally safer and less prone to destroying data you need or messing up your backup. …

Since each computer stores backup contents in a sparse disk bundle, you could even shift a backup or two to the other drive and then reconfigure things if your initial allocation wasn't working after some …

If both drives are connected, each backup will alternate between drives, but if only one drive is connected, all backups will go to that drive. …

If I were you, I'd perhaps pick important backup intervals and only move those to the offsite storage, but networks are fast enough that you could push an entire backup set to the cloud if you didn't mind …

If you have Time Machine enabled as a local store option or backing up to an external drive, then that file would be backed up - perhaps several versions and stores. The filesystems Apple ships do n …

Settings app > General > Reset > Erase All Content and Settings Load your last backup from iCloud or iTunes Caution: If you have someone else assist that has familiarity with what exact message is presented …

http://support.apple.com/kb/HT1427 - You can also enter the Time Machine restore interface and find files that can be removed from the backup drive itself to conserve space. …