How easy is it to replace my laptop HD wth this unit. Will a backup to external drive be sufficient to do the swap?
It's plug and play. What will you need to backup? You ideally would be replacing the internal drive with this one, so you can then just hook up your old internal drive as a slave or external to recover all your needed data. I would also suggest a clean install of the OS on this drive as opposed to attempts at ghosting or imaging.