folder and try to reduce its size. It's your main problem...
Regarding to Google. I presume that you use Chrome browser and it may accumulate a lot of data in its AppData folder. You can/should manage it with removing its history data. Otherwise it may just grow there almost indefinitely... There is a simple way I do it with my Iron (aka Chrome):
1. I launch it with shortcut, that contains option like this:-user-data-dir="D:\Temp\Iron\p"
It uses profile on drive D: and never uses its default profile on drive C:
2. Time to time I clean up the profile folder, keeping its configuration only (pure profile with all its configuration, bookmarks, extensions is usually less then 160KiB in size). I' found BAT files, that help me to do it here
When you update your Chrome/Iron, you update executable files only. Your profile on drive D: remains intact and usable again...--
Keep it simple, it'll become complex by itself...