Well, at step 3 I get the error "Warning Unsupported Operating System(s) detected. PINN currently cannot backup the following OSes correctly:That's great news!
If your files are generally ok, here's what I would try:
1. Restore your backup
2. Replace NOOBS with PINN
3. Use PINN to backup all your OSes to a USB drive
4. Reinstall PINN with Rpi Imager to wipe the disk and start a fresh
5. Reinstall your Backed-up OSes from the USB drive.
That should sort out your partition table layout.
Raspbian Lite (UPDATE Reqd).
And "An error occured backing up. Perhaps there is no disk space?" When backing Raspbian Full

I've also noticed, that total free space in PINN looks incorrect for mmcblk.
Here is gparted screenshot from the booted Raspbian Full (/dev/mmcblk0p7): Software is not complaining that something is wrong with partitions...
What I see is 16MB unallocated space in the begging, 2MBs between partitions, which should be OK. But who knows how sensitive RPi GPU ROM for these small details when it tries to read files from FAT.
Statistics: Posted by mrpib3 — Thu Apr 18, 2024 4:57 pm