If you use iTunes, don't forget to deauthorize the old PC. Also, NAS prices are so low now it's worth looking at during the move to the new PC as well as afterwards. Buffalo Linkstation prices now compete with USB disks. I store all my music and large movie files there, and response time is fine. MSFT Files and Settings Tranfer wizard works pretty well as does MSFT Office Save My Settings Wizard (with an excellent destination for these files on your NAS device).
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