I only have a 500MB SSD I use for Windows and MSFS. I put all of my main mods (Working Title, Dependency mods, ect) the ones I use all the time on my SSD. The others I have just a 1 TB HDD that is nearly full now too. I honestly have not seen an impact by storing the mods on a HDD instead of a SDD I’m sure there would be a measurable impact if I were to actually benchmark or whatever and had a clean system. When I build a new system I am going to get another larger SSD to keep everything MSFS related on it. Trying to wait for the Zen 4 release and PCI 5.0 and DDR5 have been out for a little while and get stable. Also by that time we should see the new generation of video cards (RTX4 and Navi31?)