Hi, GiaThnYgeia wrote: > drwx------ 2 root root 16384 Mar 10 03:21 /media/user/sid/lost+found
If you were not superuser or ran xorriso under sudo, then the ownership and permissions are a valid reason for being unable to read its content. I do not generally advise to make backups as superuser. But since the mounted USB stick probably contains files of many users with various permission sets i now propose to become superuser or run xorriso under control of program sudo: sudo xorriso \ -for_backup \ -outdev usb_part1.iso \ -map /media/user/sid / > drwxr-x---+ 5 root root 4096 Mar 13 13:52 .. Greg Wooledge wrote: > It indicates the presence of an ACL (file access control list), Well, it's the boss directory which we do not want to backup. Nevertheless, Debian's build of xorriso run with settimg -for_backup will record ACLs and Extended Attributes. Linux mount will not show them, but xorriso will be able to restore them. Have a nice day :) Thomas