>There's actually quite a bit of metadata that needs to be preserved when moving files between filesystems (file type, permissions, atime/ctime/mtime). Modern f

>There's actually quite a bit of metadata that needs to be preserved when moving files between filesystems (file type, permissions, atime/ctime/mtime). Modern file systems support extended attributes for regular files and you can copy files between file systems with xattrs without too much trouble these days. Those are not hard requirements. It's nice to have, but in doubt it will just be what the destination filesystems think those values should be. >There's a lot of stuff that's not "in" the file. Like it's name. Correct. And everything not in the file is in danger of being lost. The filename (with extension) is the minimal viable data that has a chance to survive. The extension even more so than the basename.