Heres how I do this
Backup:
find /home/pi/RetroPie/roms/ -name ".srm" -o -name ".state*" | tar --transform 's|/home/pi/||g' -PcJf /home/pi/savegamebackup/savegames.$(date +%Y-%m-%d).tar.xz -T - 2>&1
Restore:
tar -C /home/pi/ -xJf /home/pi/savegamebackup/current/retropie_saves.tar.xz 2>&1
Heres how I do this Backup: find /home/pi/RetroPie/roms/ -name ".srm" -o -name ".state*" | tar --transform 's|/home/pi/||g' -PcJf /home/pi/savegamebackup/savegames.$(date +%Y-%m-%d).tar.xz -T - 2>&1
Restore: tar -C /home/pi/ -xJf /home/pi/savegamebackup/current/retropie_saves.tar.xz 2>&1