Time Machine no available destinations

Diego_FR wrote:

Hello. I'm using a Macbook Air M3 and a Mac Mini M4. Both since last January with Sequoia.

I bought an external 1TB M.2 SSD and a Thunderbolt enclosure. I did some APFS volumes and two of them are for Time Machine Backups. I set a quota to avoid getting out of space in other volumes in the same disk and I selected two volumes as Time Machine backup disks. It worked as expected.

Last week I need to modify the space quota in one of them, so I deleted the volume and made another one with more quota. The problem is that when setting the new disk in Time Machine it shows the message "no available destinations". It doesn't find any of the 4 APFS volumes created. But the disk is properly connected and I can see the volumes. I can even see them in Time Machine options, for avoiding backup that units.

The other Time Machine volume is still making backups properly, so I'm completely lost here.

Any idea why it can't be selected as Time Machine disk again?

I'm using another USB disk, but it's slower and I want to set the other one again.

Edit. I just tried setting a partition instead of a volume and now I can select that as new Time Machine Disk. I don't know what happens with selecting volume instead. As I mentioned, it was working like that until I had to set a volume again

TM likes to have it's own dedicated drive, not shared with other volumes...

If you can't back up or restore your Mac using Time Machine

If you can't back up or restore your Mac using Time Machine - Apple Support

Erase and reformat a storage device in Disk Utility on Mac

Erase and reformat a storage device in Disk Utility on Mac - Apple Support

If you value your user data

3-2-1 Backup Strategy: three copies of your data, two different methods, and one offsite.

More than one device, more than one backup methodology.