1st hit the start menu and go to Run (or use Windows Key + R shortcut) and then type gpedit.msc then hit enter.
Navigate to Local Computer Policy > User Configuration > Administrative Templates > System > User Profiles from the left sidebar.
Now double-click on Limit profile size from the right pane and open it.
From the top, select the “Enabled” button. Also, you can set the maximum profile size for each user profile and the custom message to show when the size is exceeded from the bottom part. Read the help content there for more info.
That’s pretty much of it. Hope Nancy can fix her problem now.