onedrive

My uncle bought a new Lenova computer with windows 11 on, last year. He uses outlook as his email. It is now saying that onedrive is full and can't receive or send any emails. He didn't set one drive up so not sure how his photos etc have went there. How can he free up space so he can access...

I want to load a ts video file to onedrive but it keeps failing--avi etc load but not ts and it's important to load as ts--can anyone please give me a dummies guide---I tried all the so called links for info and followed them but to no avail. Please remember I am blind so nice easy steps...