Jon Klaus received a Western Digital Black SN750 M.2 SSD for testing at Storage Field Day. Naturally, he wanted to use this fast little NVMe drive as his Windows Boot disk. What he thought was going to be a simply clone and swap from an older SSD turned into anything but. If you’re considering swapping out a drive on an old Windows install, it’s a good idea to read Jon’s post to understand the UEFI vs BIOS when it comes to setting up boot drives. Who knew it could get so complicated?