Windows

Backing up your game:

1. Go to My Documents.
2. Open the Electronic Arts folder.
3. Find The Sims 4 folder.
4. Right-click on it and choose Copy.
5. Go to your Desktop.
6. Right-click on a free space and choose Paste.
7. Right-click on the copied folder and choose Rename.
8. Change the name of the folder to something you'll remember, like Sims 4 Backup.

To reset your game:

1. Go to My Documents.
2. Find The Sims 4 folder.
3. Click on it and press Delete.
4. Confirm you want to delete the folder.
5. Empty your Recycle Bin.
6. Restart your computer.

Mac

Backing up your game:

1. Open Finder by clicking on the Finder (blue smiley face) icon on your Dock.
2. From Finder, open your Documents folder.
3. Open the Electronic Arts folder.
4. Click on The Sims 4 folder.
5. Press Command/Apple and C on your keyboard to copy the folder.
6. Go to your Home screen.
7. Click on a free space on the screen and press Command/Apple and V to paste your backup folder.
8. Rename the folder (click on it and press Return) to something you'll remember, like Sims 4 Backup.

To reset your game:

1. Open Finder by clicking on the Finder (blue smiley face) icon on your Dock.
2. From Finder, open your Documents folder.
3. Open the Electronic Arts folder.
4. Click on The Sims 4 folder.
5. Press Command/Apple and Delete.
6. Confirm you want to delete the folder.
7. Empty your Trash.
8. Restart your Mac.

Windows

1. Go to My Documents.
2. Open the Electronic Arts folder.
3. Click on The Sims 4 folder and press Delete.
4. Confirm you want to delete the file.
5. Empty your Recycle Bin.
6. Go to your Desktop.
7. Right-click on your backup folder and choose Rename.
8. Change the folder name back to The Sims 4.
9. Right-click on the folder and choose Copy.
10. Go to My Documents.
11. Open the Electronic Arts folder.
12. Right-click on a blank space in the folder and choose Paste.

Mac

1. Open Finder. Click on the Finder (blue smiley face) icon on your Dock.
2. From Finder, open your Documents folder.
3. Open the Electronic Arts folder.
4. Click on The Sims 4 folder.
5. Press Command/Apple and Delete.
6. Confirm you want to delete the folder.
7. Empty your Trash.
8. Go to your Home screen.
9. Click on your backup folder. 
10. Press Return and change the folder name to The Sims 4.
11. Press Command/Apple and C on your keyboard to copy the folder.
12. Open Finder. 
13. Open your Documents folder.
14. Open the Electronic Arts folder.
15. Click on a blank space in the folder and press Command/Apple and V to paste your backup folder.