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#21
You can try to capture a backup image of the HD to see if it transfers to a replacement satisfactorily. Since you have Seagate you can use Seagate Acronis premium imaging/cloning free utility which works quite well. The Manual is on the downloads page and easy to understand.
I would not waste any time creating the image.
Be sure to back up your files separately first which should already be done at all times. In order to mount an Acronis image to access files you must also have the full edition.