Dear all, I solved the "backup-issue" by mounting my Pixel 3a XL into my linux drive via ssh by sshfs [user@]host:[dir] mountpoint [options] (see also https://linuxconfig.org/how-to-mount-a-remote-filesystem-over-ssh-with-sshfs) Once the phone is a "normal" drive in the linux-system, rsync can be started normally and no rsync-daemon on the UT-device is necessary. Best regards Jörg