Warning - if you copy linux files and directories from the native linux
filesystem directly to a pc filesystem (such as fat32) you will lose
something, because pc filesystems don't understand unix semantics,
permissions and ownership, symlinks, hard links, sockets, pipes, quotas
or other unix filesystem features. But you can back up the linux files
or directories as tar files, and then safely store the tar files on a pc
filesystem, because tar will preserve the unix information, which can
then all be restored by unpacking the tar files again on a linux filesystem.