I have a laptop that is pretty much a desktop replacementFor extra storage space, I decided to buy an internal hard drive and use a Aluminum external enclosureHowever, after being warned by a friend that these may damage the hard drive, I looked up all over online to see if it really did hurt the hard driveAll the results are conflicting and I was wondering if it was a good idea to leave it on all the time as I back up files on a regular basis with this hard driveSo, question is: is it safe to leave this on all the time? If not, should I get another external case? Which one?