Mac mini M1 sound and storage problems

Hello,

My mac mini sound stops playing after about 30 minutes sometimes 1 hour but my intel Mac Pro could play music non stop with no problems and the second is my others storage is over 200. i tried deleting everything and its not any better what should i do. i tried clean my mac with my subscription but it didnt work what should i do cause i need that storage to store 8k footage. i cleared everything FCP library and iMovie library but nothing better.