...
I:addFile '/data/extm' including root: 1
==> set selinux context: u
bject_r:extm_data_file:s0
failed to lookup tar policy for '/data/extm' - '200588523a8c7d77'
I:Error adding file '/data/extm' to '/data/media/0/TWRP/BACKUPS/103cd7fe/2021-01-31--20-29-02/data.f2fs.win007'
Error creating backup.
I:ERROR tarList for thread ID 0
Error creating backup.
I:InfoManager saving '/data/media/0/TWRP/BACKUPS/103cd7fe/2021-01-31--20-29-02/data.info'
createTarFork() process ended with ERROR: 255
Backup Failed. Cleaning Backup Folder.
There's over 32 Gb memory available.