^ Yea, have to have advertizment - in this case it's in the form of Blue words in the hope that someone will click on them.
Norton sometimes mis identifies files as being "bad" and deletes them. Normally it will ask to either delete or quarantine the file(s). It could have corrupted the FAT. Most likely if you can not read the drive the files are toast.
That's what I thought, but I saw a web-site that says they can get back your information, but, of course, there is a fee involved. Are you aware of such a company?