I got it working!!
I did the search for Saves - of course I had a few of them show up since I'd tried several times to copy things over. But I finally found out that it was saving all the current info (from the game) in Onedrive! I know there are messages in here about that, so I tried to look up those and figure out how to get it to save locally to this PC. Couldn't get that to work, so I finally just accepted it was going to save all the info to my Onedrive. Which is perfectly fine with me because I've got PLENTY of storage space in there.
I copied over all my old data to that location where it was saving current game info. AND it works - all my saves, data, mods, all there.
I've been playing for a little while and I have to say - MAJOR improvement! HUGE! And I have shadows now! LOL Never saw those before on the other computer. 🙂 Very cool (and kind of annoying at the same time) LOL But most importantly, NO LAG! It takes only seconds to travel (before took several to many minutes. I could get up and fix something to eat or go to the bathroom and it would still be transitioning).
Thank you so much everyone for all your help!