Tvheadend

There's no built-in way to do this, as recordings only expire based on age. You could have an external script (perhaps on cron) that deletes the oldest/largest files if you run below xxxMB disc space, but it's brutal. I'd expect to delete something you actually wanted to keep...

Hello,

perhaps my solution (see https://tvheadend.org/boards/4/topics/17325) is of any interest for you?

Cheers, Thomas