My hdd and ssd were both on windows 8 last night, and then I upgraded the hdd to windows 10 with the intention of doing the same to the ssd later. The ssd has ~350gb of steam games on it, and this is still reflected when looking at the disk in explorer or looking at its properties. However, after the hdd was upgraded to windows 10, all of those games are no longer there as far as I can tell, even though the ~350gb is still being used on the disk. I tried looking in every folder on the ssd (it's new, not much to look through) and I can't find these files. I turned on hidden files and folders and looked in the recycle bin, nothing.
I could upgrade the ssd to windows 10 to see if that would fix it but I'm hesitant because this issue occurs when booting through both the hdd and ssd; even when booting directly to the ssd I still can't find them. I'd really rather not have to format and redownload all those games if possible, but I'm not sure what to do here.