Hi.
Where you're uploading you're doing fine.
Where you save you have a problem, you do it too often.
You need to optimize your saving, it's best to do it by trigger. For example in the event when your player touched a coin and you gave him points.
If it's not clear, you can make it even simpler. Do this regularly every few seconds. That way the data will have time to save and performance won't suffer.
I showed in the screenshot.