Well, I just use the Trash as temporary storage for 7 days, then it's gone. But, it might be useful for some users to have an option to keep for longer than 31 days if that's the way they like to organise their files. Personally, I use a 1TB main drive on the receiver and I archive mostly music programmes to my NAS. Over the past 10 years I don't think I've ever used more than 60% storage of 1TB on my main receiver even when I had dedicated folders for various programme genres prior to the "collections" option being introduced.