I have read that NFTS is a little bit different in W7 then it was in XP and Vista. Is this true? How does this impact putting multiple system backups on one external mega HD? I backed up my Vista system on an external HD for many years but it went casters up a few days ago. Also I have had an ext HD for many years for my XP backups that only support USB 1.1 ports. Its life expectancy has exceeded my expectations, but I am concerned that due to its age it may expire any day. I have been using Paragon Drive Backup 10 Pro for Vista, XP and W7. I purchased a new WD Passport Elite 500GB & was looking at putting my Vista, XP and W7 backups on the same drive using PDB10. I will not be using the built in smartware software for backups (weird stuff!). If I do this will I be able to recover the backup for all 3 systems? Anything I should heed prior to doing this? NB: I have already put a full image of my W7 on the external HD.