Open Site administration ► Plugins ► Caching ► Configuration Go to the dataroot filesystem and take note of the time of the folders/files representing the cache e.g. # cd $CFG->cachedir/cache/cachestore_file/default_application && ls -lh */ Purge the Default file store for application caches Check the file time: it should return the current time Create a new file store ( Add instance at the end of the row identified by column Plugin = File cache ) in a Cache path really different from the default one e.g. /tmp/moodle-master-cache-file1 Edit the Language string cache mapping and point it to the new file store Again: take note of the time of the cached files, wait at least 1 minute (to take advantage of reading the time with ls -lh ), purge the new file store and re-check the time of the files