Steam allows 1GB of Cloud space per user account.
You must have an active Internet connection to use the Cloud Save Settings.
Epic allows a maximum of 314MB per save file per user account, with 'fair usage' used for the overall limit.
You must have an active Internet connection to use the Cloud Save Settings.
If nothing above works, please submit a support request stating exactly what you've tried so far, and a member of our team will try to help.