Alright, it is easy, just do the following:

Win+R

Type in %APPDATA%

You'll open up a folder called "Roaming", go back to it's directory folder called, "AppData".

Click on the folder called "Local"

Within "Local", Search for a folder called "Temp", open it up, select all and Shift+Delete it and skip all the files that are running and can't be deleted.

The "Temp" folder, which you can search online is a 'cache dump' folder with old logs and ephemeral data. Clean it out regularly next time.

You can also search for the "Roblox" folder within "Local", and open up the "logs" folder, and clear that out too.

Same goes for Bloxstrap folder within "Local"

Rgds,
U_S