Description of problem

I've found a large data folder on my SSD. I use this as my main OS drive. I'm wondering what this is for and if it's save to remove or if there's any way I can reduce the size.

C:\Users\USER\Documents\Data

Please see the screenshot:

https://i.imgur.com/cdVPyiN.png

Other relevant info

I'm using Windows 10 Pro, 1703

When this issue began

Unknown

Recurring issue

Yes

Cause/Steps to recreate the issue

na

What I've tried so far to resolve the issue

na