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(If you choose this solution, you’ll want to regularly back those files up to another device backed up catalog files aren’t much good if the drive they’re on dies.) You can either disable this feature (on the previously-mentioned Directory Backup tab), or alternatively, exclude the folder that holds the backups from Time Machine. In my case, I was seeing in excess of 2GB on each and every backup. I found out the hard way that if you have this feature enabled (it’s found on the Directory Backup tab of the TechTool Protection System Preferences panel), you will get continual huge hourly Time Machine backups.
#How much is time machine for mac pro#
One possible cause of repeated large hourly backups is TechTool Pro 5’s Directory Backup feature, which creates a copy of each hard drive’s catalog (a file that tracks the files on the drive). Beyond the time required for each hourly run, this issue meant my Time Machine drive was rapidly filling with data, leading to a shorter history for keeping multiple copies of files.
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Sometimes, though, Time Machine seems to lose its mind, and instead of small, fast hourly updates, I’ll see hourly runs that take many many minutes to complete. So much so that it has become my always-there backup solution, and I rarely think about it unless I need to retrieve a recently-deleted file from the archive. Time Machine, OS X 10.5’s built-in backup solution, normally runs reliably and trouble-free for me.