I've put in a request in the Moodle Tracker about including a basic Search Function into the Moodle File Repository (within the File Picker).
As an administrator and teacher of a Moodle course I find it super hard to find files in the Site Files directory and a simple Search by "file name" functionality seems to make sense to me?
https://tracker.moodle.org/browse/MDL-40383
https://tracker.moodle.org/browse/MDL-23296
Please vote for this issue to be resolved, if you think this would be a good funtion.
I know that Moodle is not a File Repository, but us poor K-12 schools can't afford a proper CMS and a simple name search would help a lot..