I just installed a second M2 drive on my box because the one with my OS and games was running out of space. I found this old guide on how to move your Vortex/Skyrim (Move Vortex mod folder to another drive - Page 3 - Vortex Support - The Nexus Forums (nexusmods.com)) but it requires either moving your Steam installation *and then starting Skyrim from the Steam client*, which will of course upgrade to AE, or else moving the game folder from within Steam, which Steam refuses to do without upgrading Skyrim. So it's a Catch 22.
Is there a work around?
The only one I can think of is to go ahead and upgrade to AE and then go through the pain of downgrading again, which I'd really rather avoid...
Or should I just finish my current playthrough and upgrade (and rebuild my mod list) before starting the next one?