Game not downloading

I recently started to play the sims 4 again and when I tried to play everything was disoriented and wack on screen and it might be because I haven't played in about a year or so my mods might need to be updated. I followed the advice to solve the problem which was to uninstall the sims 4 and reinstall it after clearing my cache if it didn't help fix the problem so I did. Another thing to know is that I ran out of space on my computer C drive or local drive and got an external 2 tb hard drive to put my game on. I keep trying to download it on my new hard drive, but it just isn't working. Please help I love to create sims and i really want to create sims now that school is out.