If you have SSRS files filling your temp drive, look for the RSTempFiles.
C:Program FilesMicrosoft SQL ServerMSRS11.MSSQLSERVERReporting ServicesRSTempFiles
You can move this folder to a different drive by copying the RSTempFiles folder to the target drive (for this example “R:RSTempFiles”).
Make sure that the SSRS service account alias has full permissions on the folder
Default local machine service account alias:
Locate the rsreportserver.config file
C:Program FilesMicrosoft SQL ServerMSRS11.MSSQLSERVERReporting ServicesReportServer
In this file Located the <Service> tag and add entry for FileShareStorageLocation with new path:
After saving the file restart the SSRS instance. It should start using the new location.
For more info about the files stored in this folder: