Not enough iCloud storage – How to manage your iCloud account
Of course, you can do the obvious and upgrade your iCloud storage, but that will set you back $20 a year for 10GB, $40 a year for 20GB or $100 a year for 50GB of data. Before you upgrade, try some of these tips to free up some space and see if you can get by with the 5 GBs of free data cause with those money, you might as well upgrade to an iPhone 6.
You can easily browse through your iCloud setting on your iPad, iPhone or iPod touch and find out exactly what is eating up your iCloud storage. To do so, go to Setting-> iCloud-> Storage & Backup-> Manage Storage. Here you can see which devices and apps are using the most storage.
You can tap on the device under Backups and turn off certain apps that are using iCloud to free up some space.
From here you can also delete your backup data. However, it would be a good idea to plug your iPad into your computer and sync it first to create a backup in iTunes. Then, you can tap Delete Backup.
If you want to continue to use iCloud to backup your device, go to Setting-> iCloud-> Storage & Backup and turn on iCloud Backup.
Check did you setup iCloud Correctly
Method#2 for getting more storage is managing your photos and other datas. Check this guide out to delete photos on iCloud.
Don’t Share Your iCloud Account
Do not share your iCloud account with other family members. You will want to have all of Your iOS devices using the same iCloud account, but if there are other household members using iOS devices, let them use their own iCloud account. That will give each person 5GB of free data and keep you from getting on wanted items on your devices.
Some people may find it necessary to pay for additional storage, but most iOS users will do just fine using the 5GB of free storage if managed properly.