Hi,
So I tried something... tried to back up from an ext4 filesystem to exFAT. rsync works without any problems. With the best regards, David david@nitro ~> uname -a Linux nitro 5.3.0-46-generic #38-Ubuntu SMP Fri Mar 27 17:37:05 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux david@nitro ~> sudo rdiff-backup -v 5 --force /home/ /media/david/Backup\ SSD/Nitro/home/ Using rdiff-backup version 1.9.0b0 with cpython /usr/bin/python3 version 3.7.5 on Linux-5.3.0-46-generic-x86_64-with-Ubuntu-19.10-eoan, fs encoding utf-8 Unable to import win32security module. Windows ACLs not supported by filesystem at /home ----------------------------------------------------------------- Detected abilities for source (read only) file system: Access control lists On Extended attributes On Windows access control lists Off Case sensitivity On Escape DOS devices Off Escape trailing spaces Off Mac OS X style resource forks Off Mac OS X Finder information Off ----------------------------------------------------------------- Exception '' raised of class '<class 'AssertionError'>': File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/Main.py", line 390, in error_check_Main Main(arglist) File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/Main.py", line 412, in Main take_action(rps) File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/Main.py", line 348, in take_action Backup(rps[0], rps[1]) File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/Main.py", line 424, in Backup rpout.conn.fs_abilities.backup_set_globals(rpin, force) File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/fs_abilities.py", line 1044, in backup_set_globals dest_fsa = FSAbilities('destination').init_readwrite(Globals.rbdir) File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/fs_abilities.py", line 159, in init_readwrite self.set_case_sensitive_readwrite(subdir) File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/fs_abilities.py", line 325, in set_case_sensitive_readwrite assert not upper_a.lstat() Traceback (most recent call last): File "/usr/local/bin/rdiff-backup", line 32, in <module> rdiff_backup.Main.error_check_Main(sys.argv[1:]) File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/Main.py", line 390, in error_check_Main Main(arglist) File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/Main.py", line 412, in Main take_action(rps) File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/Main.py", line 348, in take_action Backup(rps[0], rps[1]) File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/Main.py", line 424, in Backup rpout.conn.fs_abilities.backup_set_globals(rpin, force) File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/fs_abilities.py", line 1044, in backup_set_globals dest_fsa = FSAbilities('destination').init_readwrite(Globals.rbdir) File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/fs_abilities.py", line 159, in init_readwrite self.set_case_sensitive_readwrite(subdir) File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/fs_abilities.py", line 325, in set_case_sensitive_readwrite assert not upper_a.lstat() AssertionError