Hi,
It's complicated; but here's a great video on how to CLONE your old drive onto a brand NEW drive from Britec. They are a big Macrium reseller and that's our number 1 recommended image backup software here as told to you by neemo and nmsuk.
Here's that link:
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Watch it a couple of times, all your questions will be answered.
If you still can't figure it out, consider taking your computer and the new hard drive to your Local Computer Pro and pay him to clone it for you.
Good luck,
<<<BIGBEARJEDI>>>