How do I move files from SSD with OS to new PC with OS installed already.

Mar 17, 2018
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My motherboard recently bit the dust. Since the system was pretty dated and I didn't have time to do much research and build my own so I went the route of buying a prebuilt system from newegg.


I want to move/save files that I have on my SSD from my previous computer onto my new system/an external drive before I wipe it and move it into my new PC to use as a boot drive.
However because the SSD has an OS on it...and the new PC's HDD has the OS on it, will I run into trouble with drivers and such/any other issues when I plug it in to save files? Also.. how do I delete the old OS from the SSD/ Win10 from the HDD so I can reinstall onto the SSD?

Thanks for the help!