I have a lot of storage left but will not let me back up my phone
How do I back my phone up. It will not allow me to but shows I have plenty of space to back it up?
Question marked as
You hardly have 38 GB of space.
What is the size of the next backup on iCloud? Have you checked?
Please check if you have enough iCloud Storage. Connect to the Internet over WiFI and keep it connected to power. Please check iCloud available storage vis-a-vis the backup space required.
Alternative: Choose what to backup and what not to.
Settings > [Tap your Name] > iCloud > iCloud Storage > Backups > [Select your Device, if you have more than one] >
Here You have the next backup size
Choose data to backup. Disable the apps which may consume more space and are not important to you. Note this only backup data within App, not the app itself.
Do not forget to tap "Show all Apps" to see all the apps' data that is getting backed up.
Watch the GIF below to know the size of the next backup.