Thanks.
But, I've now ran into another problem.
I moved the sims folder from the SSD to the HDD, and accidentally permanently deleted the folder, and now when I try to install the stuff packs that I purchased from Origin, it says this -
"Origin was denied access to the following file or folder: D:/\.
This may be due to security restrictions or disk corruption. Check the folder permissions or check your disk for errors before retrying the download."
Do you know what I could do to fix this?