If I were to move my steam folder to my other hard drive, and I were to a get a new computer. Would I not need to back up my games on to an external hard drive; could I just put the hard drive with the games on into the new pc one and just install the games from there?
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It's very doubtful you could move the drive over, and reload the games from that. Personally I would just get steam to redownload them, and be selective about which games you pull down if you have a slow inet connection.