Basically, I want to copy my C drive (128g M.2 SSD) which has my Windows OS, other files, etc. to my external USB hard drive and then restore that onto a new larger 1tb M.2 SSD I recently purchased. My motherboard only has one M.2 slot, I assume I could just copy my C drive (OS) to external drive, install new SSD, then boot from external and restore. I tried using EaseUS disk copy, todo back up, but could not get my external drive to be bootable. (seemed scammy idk) My main problem seems to be that I can't get my external to boot. I am clearly dumb with computers, so laymens terms would be appreciated if possible. Thanks!