If you can't back up to iCloud

Learn what to do if you need help backing up your iPhone or iPad with iCloud Backup.

If an alert says that there's not enough iCloud storage

Open the Settings app, then tap your name.
Tap iCloud. At the top, you can check how much iCloud storage you've used.
Tap Storage or Manage Account Storage.
Tap Backups, then tap the device you're using. Next Backup Size should show you the size of the next backup. It might take a few minutes for your device to calculate Next Backup Size.
If your backup needs more space than the amount you have available in iCloud, you can:
- Delete information that you don't need to reduce the size of your backup
- Upgrade your iCloud+ plan to get more space

Open the Settings app, then tap Wi-Fi to make sure that you're connected to Wi-Fi.
Open the Settings app, tap General, then tap Software Update. Download and install any available updates for your device.
Try to back up on another Wi-Fi network.
Check to make sure that you have enough iCloud storage for the backup.

Open the Settings app, then tap Wi-Fi to make sure that you're connected to Wi-Fi.
Check your upload speed.
Leave your device connected to power and Wi-Fi for 24 hours. If your backup still isn't done, archive important data, then try these steps again.

Check if a restore is still in progress. Open the Settings app, tap your name, tap iCloud, then tap iCloud Backup. If your device is still being restored, you see “This [device] is currently being restored and will automatically back up when it is done.” You can create a new backup after your device finishes restoring.
Check whether you installed a profile that restricts iCloud Backup. Open the Settings app, tap General, then tap VPN & Device Management to see a list of installed profiles.