Icloud backup size large

Thanks for the response. When I calculate together all apps which I have selected to backup I end up less than 1 GB. Existing 5GB storage use is a bit over 3GB. So 5GB should be enough. However, backup calculates I that next backup size is over 5GB. So I need to buy extra pint pot even if I am have less than pint altogether. Anyway, now I ended up purchasing additional memory. Price is not too much, more of a question of principal. Same Apple culture can be seen in connectivity to other vendor systems. And why the phone cannot be backed up elsewhere than iCloud? I have 1TB cloudspace with MS but no option to use that for backing up there.

Thanks again for comments. Yes you can backup to pc but it is not comparable to backing to cloud. I actually pay 100$ a year to MS and it provides licenses for MS Office for the whole family and 1TB for each family member. I would rather back up my phone there but not possible. Anyway, enough complaining. iPhone is a good phone but feel too locked in to it.