I purchased one Seagate STGY8000400 for mass storage of movies, music, etc., and I bought a second one for the purpose of backing everything up. When I have them both hooked up to a desktop, it only reads one of them at a time. I had a WD Elements before the first Seagate and it tipped over and I believe ruined it but I was able to salvage the files from the WD to the Seagate and it read both of them no problem but with two of the same Seagate it won't read them both. Is there some way to get them to read or is there some kind of problem with having two of the same hooked up to the same machine?