michaelsanford
Translator, Web Developer
I was curious, when looking through my Time Machine backups, how exactly it decides what goes into a "daily" backup. After some searching, I found this
What if I've created a file at 12 h 00, accidentally deleted it at 16 h 00 but need it the next day? Shouldn't Time Machine apply the same clever diffing system it uses to choose which files to back up, to the whole day's backup and keep a backup of the whole day's activity?
(Sorry if this should go in Open Letter, but I felt it would better live here in case someone can contradict me, which would be great.)
If this really is the behaviour of Time Machine, I think we've got a bug.At 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. Each daily backup is maintained for a month. 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).
What if I've created a file at 12 h 00, accidentally deleted it at 16 h 00 but need it the next day? Shouldn't Time Machine apply the same clever diffing system it uses to choose which files to back up, to the whole day's backup and keep a backup of the whole day's activity?
(Sorry if this should go in Open Letter, but I felt it would better live here in case someone can contradict me, which would be great.)
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