How to Upgrade iCloud Storage Plan
Apple has expanded their iCloud storage plan lineup to offer dramatically increased storage capacities for a monthly fee. The new pricing plans offer up to 2TB of total storage capacity, which should be plenty for just about any gadget owner, even if you have a handful of iPhones, iPads, and Macs in use on a single Apple ID.
Having adequate iCloud Storage is important because it allows you to make iCloud backups of iOS devices and files from Mac OS X apps. Additionally, Mac OS and iOS offers the iCloud Drive feature which will rely on the same cloud storage capacity for storing files as well.