For FCPX users, you still will benefit from this app, as FCPX does not clear all things, and still leaves a lot of files there. Also, X-wiper is easier to clean up your whole project. This app will help you to clean up Final Cut Pro X libraries or projects and events. It is an easy way of deleting files not needed prior to archiving. You can choose to delete: render files, proxy files, high quality media files and optical flow files. All of which can be generated if needed later. Only folders of more then 100MB will be checked for deleting by default. You just don't want to archive to much data. So this app will help you clean up your Disc, SparseImage, Movie folder or SAN location. You can toogle all on/off, by using the header for each type of files. i.e. a film shot with a Panasonic AG-f100 camera, makes AVCHD folder of 8,7 GB. On importing to FCP X you get a new 8.7 GB just on the import. This is you extracted original recording. But were are still in H.264 land of codecs. You want to use a more powerfriendly codec, and you do a transcode to ProRes for editing/online. Now you have a transcoded folder of 60 GB! Add to this, your renders for both events and projects. Now, if you duplicate you project and have, say version 1, version2 etc, then you quickly get some GB's per project, depending on how long the movie will be… Just say 2 versions and 5 GB each.. So, you started with 8,7 GB and ends up with over 80 GB when the project is finished….. how then to get back to what you really need for you archive ? Instead of manually choose all projects and event and remove render files, just use X-wiper and drop you main-folder onto it. Now you can delete all render files, and transcoded files and more, in one go.