How do I manage my iCloud storage to clear up space?

Thanks, but that is precisely what I have been looking at, and comparing from one week to the next - storage keeps mushrooming and i can't see how or why, since I have been purposely removing great amounts of material from iCloud. It doesn't make sense to me....

Well, the only recommendation I am being given is to spend more money for more storage - I might end up having to do that, but I hope you'll understand that I am reluctant to do that until I understand what the problem is here. To illustrate, here is what is happening - in those few days I have removed another 10gb of stuff from iCloud (which is completely ignored), and yet still available space is reducing. No idea why.

Thank you for trying to help with this. The other possibility i considered was that of some sort of malware on the computer, but I've scanned pretty intensively for this and it looks as though I am safe.

I guess if this is not a known issue, then Apple themselves may be able to help - not sure how else to proceed.

Best regards.