I've used up all my storage, how do I delete old files so I can free up some space?

Once you are actively editing a new video (not yet rendered) - simply go to "My Clips", click into the uploaded file you wish to delete and press the delete button.

Thats pretty much it :)

If you wish to delete audio, simply click on "my tracks", go to the track in question and click on the 3 dots, a menu will appear...  simply delete the files you no longer wish to remain on your account.

https://rotorvideos.com/tracks