Save keeps loading, external hard drive

Sul sul everyone!

So the thing is I uninstalled my Sims 4 and reinstalled it to my external hard drive (Toshiba 1 tb). 

I created a backup file of my Document\Sims 4 and created a Sims 4 folder to hard drive. Installing went smoothly and I did move my save files to external's Sims 4 folder.

The problem is that the game loads smoothly to main menu but when I want to start the old save, it just keeps loading.

It took forever to install the game again to the external but was it a mistake? Is the external hard drive too slow because the save just keeps loading.

Did I place save files or something else to a wrong folder? Can I do something.

I play through EA App.

I'm sorry if there's any grammar errors. I'm from Finland and don't use English in everyday life. 😂