If you want to upgrade your PC but are confused about RAM and SSD, this guide will help you decide whether to upgrade your RAM or SSD.

So, my Google- and Search-fu is failing me. Is there a migration path from a single SSD (AHCI) to a SSD + 2TB HDD RST setup without reinstalling Windows? I was thinking clone SSD to HDD physically ...

In the end I took an image of the partition (as a backup) and then did the in-place upgrade to Windows 11. Everything went smoothly and all the odd quirks from Windows 10 appear to have disappeared.