Backup causes me a day of extra work. :-o You wonder how ?
I did the backup, reconnected the SSD to my RPI4. But instead of the USB2 port I used USB3.
That caused by 2.4G Wifi to collapse because of EM- Interference from USB3 near my router. That grounded all my ESP sensors.
Took me a while to figure that one out since it was intermittent and I did not touch any of those sensors.
With best regards from Murphy 