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I run Time Machine on an APFS formatted SSD and wondered, if it is possible to make something like a backup of my backup.

In practice I would like to copy / clone / get an image of my Time Machine SSD to a 2nd external hard drive from time to time, so that I would be able to restore my backup history to another SSD if anything happens to the Time Machine SSD (corrupt backup, ransomware etc.). Is this somehow possible with disk utility or a 3rd party software?

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  • SuperDuper! used to work fine for cloning pre-APFS Time Machine volumes. An alternative to cloning is to use multiple Time Machine volumes simultaneously. – mouviciel Jan 27 at 13:35
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I'm running 11.2.2 with a Time Machine partition on an external SSD. When I try to use the Time Machine partition as a source in Carbon Copy Cloner (v5.125), this is what I get:

"Copying to or from a Time Machine backup volume is not supported."

In the past, I've used Carbon Copy Cloner to successfully clone Time Machine backups (which is what I believe you want), but the combination of Big Sur and APFS have made that seemingly impossible, for now.

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Possibly superduperas mentioned but there is a way that gives you something like that you have requested.

Set up your external drive as a drive in System Preferences -> Time Machine. When the drive is attached Time Machine will alternate backups between this and your SSD time machine.

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It is possible and highly recommended. SuperDuper, as suggested in the comment to your question, will work, and also Carbon Copy Cloner, which I use.

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