Why is my Windows 10 user profile extremely large?

[Windows Central Question]

Windows 10 User Profile Extremely Large

I have 6 user profiles on my Windows 10: One is 72.1GB in size, another is 39.0GB in size, one has a ? mark, one is 58.2GB and one is 11.4GB. The smallest one is the Default Profile at 2.12MB.

Can someone help me figure out why my user profiles so enormous?

 

[Tumultus]

Re: Windows 10 User Profile Extremely Large

Probably personal documents, pictures, music, videos and installed apps?