This control lets you remove temporary files older than a specified
age. The number and size of temporary files is listed.
Temporary files that are attached to saved drafts will not be affected
by this operation. However,
files that have been uploaded by users who are actively in the process
of creating a new article have no such protection. To
give these users a time cushion to ensure that they have time to finalize
their article, it is recommended to accept the default value of 3 days
for the minimum age of files to be deleted. The
main source of older temporary files is users who cancel creation of a
new article after uploading files without using the post form's "Cancel"
button, so deleting temporary files that have been on the server for longer
than 3 days is usually safe.
