Glad its fixed! Please remember to use the quote button next time so people get notified when you reply. Also mark my post as a solution (where i specified you're missing the temp variables) so people searching for this problem in the future can quickly see what the solution is.
Please go into advanced settings and provide a screenshot of what you have in the system variables list (Win+R, type SystemPropertiesAdvanced in the run box then on the System Properties window the bottom button "Environment Variables")
Given the amount written and the timeframe of your drive being on your system and with no partition theres very little chance this has happened overtime. In a day or two if the amount does not move you should have your answer.