Hello there,
If your iPhone 13 Pro is indicating that there isn't enough iCloud storage for a backup despite having ample space, it might be due to the estimated size of the backup being larger than the available space. Here are some steps you can take to resolve this issue:
1. Check the Next Backup Size:
- On your iPhone, go to Settings > [your name] > iCloud.
- Tap on 'Manage Storage' or 'Manage Account Storage'.
- Select 'Backups', then choose your device. Here you can see the 'Next Backup Size'.
- The backup size might be larger than the available space, even if it seems like you have enough space left.
2. Reduce Backup Size:
- You can decrease the size of your iCloud backup by choosing not to back up certain data.
- In the same 'Manage Storage' section for iCloud backups, you can see which apps are taking up the most space and choose not to include them in the backup.
3. Clear Unnecessary Data:
- You might also have other unnecessary data stored in iCloud that you can remove to free up space. This includes old backups from devices you no longer use.
4. Alternative Backup Methods:
- If the issue persists, consider using iTunes or Finder (if you're using macOS Catalina or later) to create a local backup of your iPhone on your computer.
5. Check iCloud System Status:
- Sometimes, issues with Apple's iCloud Backup system can cause problems. You can check the Apple System Support page to see if iCloud Backup is functioning properly.
6. Sign Out and In:
- As a troubleshooting step, try signing out of your iCloud account on your iPhone and then signing back in.
7. Contact Apple Support:
- If these steps don’t resolve the issue, contact Apple Support for further assistance.
View and manage iCloud device backups - Apple Support