Re: Moving my save files to another computer
@alxsha24 Yes, you can transfer your files from one computer to another, even between different operating systems. All of your user generated content is located in the Sims 4 folder in Documents\Electronic Arts: your saves are in the Saves folder, your builds and saved sims in Tray, your screenshots in Screenshots, etc. Here's a full list of everything you'll find in your game folder:
https://sims4.crinrict.com/eng/2014/09/user-files-explained/
You can copy the entire folder from your old computer to an external hard drive or USB stick, although if you're switching OSs, make sure it's formatted for both Windows and macOS. Or you can upload the folder to a free filehosting site and download it on your new computer. Using iCloud would also work.
In any case, the best practice is to launch the game once on your new computer, to make sure everything is working properly. Then you can go into the new game folder in Documents\EA, delete the contents of the existing Saves, Tray, etc. folders, and copy over the files you'd like to keep.