Adding space
Simple directions on how to buy additional space
MacBook Air 13″, macOS 12.0
Question marked as
You can rent more iCloud space by following the steps here: link-> Upgrade to iCloud+ - Apple Support
Do note this will not increase there local storage capacity on your computer or device. It will only add storage space to your iCloud account for use with backups, and other files you may be syncing to iCloud.