The owner and group of a file are stored as numbers. So the file will be owned by uid=1005, regardless of which user (or none at all) that is on the system its connected to.
Changing the user/group to nobody won't fix your problem. Then only the nobody user (or members of the nobody group) would be allowed to access the files.
Unfortunately, I don't think there is a way to disable permission checks on ext4. See, for example, Is it possible to disable file permissions on a ext3 or ext4 file-system?