What should I do
Delete some content like vedio,photo etc
Keep abreast of the situation and delete some stuff.
Go to files and find all the downloads, documents, etc that you don't need and delete them all. After that delete every app you don't need. A good choice is to upload your photos/videos to the could and then delete them from your phone. If all those don't work them consider to restore your phone.
Run files by Google.
It could well be you got your oem log reports still turned on as I saw you have submitted a bug in the past, turn those off and delete the oem log reports.
if that’s not the case, follow the steps given by others in this thread
install it from google play and run it.
OnePlus Buds : 30 heures d'expérience audio sans contraintes
by pillow35, 2020-08-03