Do not forget, SSD is the best way to improve PC/Laptop performance:
https://amzn.to/2U5P73W
https://amzn.to/2UR5pdW
1. Select Start, then Settings and click on Accounts
2. Select Syn the settings. Check if a message appears indicate you have logged in with a temporary profile. (0:20s)
3. Restart the computer and log in again. (0:39s)
This should remove the temporary account and the files should be available again. (0:52s)