> This is why I use both Amazon Photos and Google Photos simultaneously on all my devices. If one of them screws up I've always got the other one.

That's insufficient. If one of then screws up, deletions will likely propagate to the other.

> That's insufficient. If one of then screws up, deletions will likely propagate to the other.

That's not the setup described at least. It's both of the services withing in parallel. > I use both Amazon Photos and Google Photos simultaneously

Your scenario would depend on Google being a backup for Amazon or vice versa.

Deleted photos in google photos are not deleted. They go into a "trash" folder with a retention period of, if I remember correctly, 14 days.

So, yes, they could propagate but you have time to correct the mishap.

Exactly.

And if it’s a local backup, that local backup needs to be taken offline, to avoid the same issue if things get deleted in the cloud

Or use a versioned backup so you can recover from deletes or corruption. ZFS snapshots, restic versions, even rsync + symlinks can work.