Go to cache admin /cache/admin.php Click Add instance for a File cache store Enter an absolute path eg /tmp/moodlecache and a name Tick "Auto create directory" Save, then edit the instance and confirm the path is as you entered with the leading / Check the contents of the /tmp folder. Confirm that it contains a moodlecache folder. Repeat step 3 with a windows style path c:\temp\moodlecache Deselect "Auto create directory" Save (Ignore the warnings) Edit the instance and confirm the path is as you entered with the leading c:\temp\moodlecache