I have a Latitude 5491, which I purchased refurbished 3 years ago.  It's still solid as a rock, but it came with only a 500GB (SSD) hard drive.  I'd like to get a larger drive (maybe 1TB), but am not certain what to buy.  I'm assuming this is a 2.5" drive, but do I need to be concerned about other specifications?  Is there anything preventing replacing it with an HDD?  (HDD's can get me more space at lower cost.)