# Example wrapper script in /usr/local/bin/custom-usb-backup.sh rsync -av --exclude='*.tmp' --exclude='Thumbs.db' /srv/dev-disk-by-uuid-xxx/ /srv/usb-backup/ Mirror mode restore: sudo rsync -av /srv/usb-backup/shared_docs/ /srv/dev-disk-by-uuid-source/shared_docs/ Incremental/Differential restore: Use rsync or copy manually – the USB contains the latest state as of the last run. 6. Troubleshooting 6.1 Backup fails with "device busy" Solution :
sudo chmod -R 755 /srv/dev-disk-by-uuid-source/shared_folder sudo chown -R root:users /srv/dev-disk-by-uuid-source/shared_folder Fix : Verify udev rule: omv usb backup
sudo udevadm control --reload-rules sudo udevadm trigger Check USB insertion event: # Example wrapper script in /usr/local/bin/custom-usb-backup
