For some people who want to do simple housekeep of deleting un-wanted files in your sd-card mass volume based on files are how old, this app is to serve that need. To configure, set the folder (at least one), file extension (optional), file time-stamp in terms of how many days,hours,minutes old at least. Tap Execute Rule to start deleting those files fulfilling the criteria or tap Save Rule to save the configuration to be re-used later.Important points to note: - During the 15 minutes trial, create a dummy folder where those files to be deleted to verify the deletion is correct before using it actual- If you wish and want to be extra safe, make a copy of the folder you set to delete so you can recover your files if the app delete the files wronglyThe application support English, Simplified Chinese, Traditional Chinese display.