How snapshots are created from a volume in around 0.01 second, why they will grow in size over time, how they can only be of complete volumes, and can’t be edited.
Time Machine
Does your NAS need faster storage or a faster network? If you were to improve those, would throttling limit the performance of backups?
It’s well known that writing Time Machine backups to storage is throttled to slow them down. What’s the point of using faster SSDs that are more expensive if macOS stops them from being fast
macOS logs may only last a few days, or even hours, into the past. Here’s a quick and simple way of browsing the log from weeks, months or even years ago.
When and how to use Migration Assistant to move apps, settings and documents to a new or previously owned Mac. Also how a Mac can claim an old Mac’s backups.
Understand how TM backs up and how snapshots work to minimise the size of local snapshots and backups, and the time they take. How to ensure files in iCloud Drive are backed up properly.
From dispatch of a new automatic backup, through computing which items need to be backed up, cleaning up snapshots and old backups, to success at the end.
APFS or HFS+? Which can Time Machine back up to? What about hard disks? Which format for use on PCs? And which are supported by Disk Utility now?
Released in Mac OS X 10.5 Leopard on 26 October 2007, it supported Time Capsules launched in January 2008, and in Big Sur could back up to APFS.
How large should the drive be to store all your backups for the next couple of years? Here’s how to work that out for Time Machine and other apps.
The Eclectic Light Company 