Having hourly backups means you can go back through your version choices easily - it functions almost like a universal-undo feature.
If you want to revert to an earlier version of a file you're working on or if you accidentally delete something, you usually know it very quickly. Time Machine's approach of keeping frequent recent backups and fewer older backups may seem unorthodox, but it really is brilliant when you think of Time Machine as a safety net. If you are concerned about losing any potential backup files, you can configure Time Machine to warn you when it runs low on disk space. When a drive becomes nearly full, Time Machine analyzes its backups and deletes files in a method designed to preserve as wide a range of backup dates as possible while still allowing you to have a fully restorable backup of your current system. After a month, Time Machine converts one of those daily backups into a weekly backup that it preserves indefinitely (or until your backup drive becomes full). Each daily backup is maintained for a month.
Timemachine mac backup software portable#
If the backup drive is not available, as is often the case with a portable Mac, Time Machine will resume its backups as soon as the drive becomes available.Īt midnight, or as soon thereafter as your computer is on and the backup drive available, the most recent hourly backup will be saved as a daily backup, and earlier hourly backups will be deleted to save space. Once the initial backup is performed, Time Machine will back up new and changed files every hour (in technical backup-speak, it is performing an hourly incremental backup) while the backup drive is connected.
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