I use Acronis for my desktop (552gb) takes four hours to clone my drive,on the other hand my laptop (90Gb) takes 10-15 minutes. Now the good news Seagate do a version of Acronis called diskwizard and to you me and others it's Free £0.00,job sorted and if anyone had a western digital drive they do a cut down version of Acronis. As an aside i just clone my drives then in an event of a failure i just swap drives back to normal 5 minutes max then re clone back to the drive that went pear shaped, i also alternate to two drives for safety. Sorry a bit long winded but i hope it helps you.
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