I recently installed the SK Hynix P31 Gold 1TB M.2 drive as my 840 pro 256gb from ~2014 ran completely out of space. I would like to make it my boot drive and use the old SSD as spare storage. I managed to copy the entire old SSD onto the new one using AEOMI Backupper and I've already taken care of all of the partitions. The drive looks all good to go, but when I go to change the boot drive in BIOS, I don't see it anywhere. It's been a while since I've been huge into computers so help is much needed/appreciated. It may be worth noting that my NVMe drive is connected via an adapter to a PCIe x16 slot. It's a build from 2013/14 so the parts are a bit older. i7-3770k, ASUS P8Z77-M Pro mobo, 16gb RAM, 780ti, and aside from the 256gb 840 Pro SSD, there is also a 2tb WD HDD. And when I say there is no space on the current boot SSD, I mean it is non-existent (single or double digit MB free), so drivers are a pain to download. All help is appreciated, as I want my PC at its full potential as soon as possible. Thank you!