Fabio I tried to back up on a USB, and it was successful, but when I tried to restore, the message I have is: no backup file found, but if I use a pc, the file is there. Any suggestion I have 2 PIXEL 8
other8026 Fabio Unsure myself because I haven't used Seedvault in a while, but if I were in your situation I'd try moving the backup folder to the device's storage and try from there instead of the USB drive.
JustBeginnez https://discuss.grapheneos.org/d/22082-8a-no-backups-found-no-matter-what-seedvault-you-have