WhatsApp backup is essential for restoring chats during phone switching or loss.Sometimes, users encounter the 'Couldn’t complete backup' error on WhatsApp.Ensure a stable internet connection as it is crucial for successful backup.Manually initiating the backup can fix bugs or glitches causing errors.For iPhone users, allowing WhatsApp to use iCloud can resolve backup errors.On Android, ensure WhatsApp is allowed to use data in the background.Enabling Background App Refresh for WhatsApp on iPhone is crucial for automatic backups.Excluding videos from the backup can help prevent backup failure.Clearing WhatsApp and Google Play Services cache can resolve backup issues.Updating the WhatsApp app or reinstalling it can be effective solutions as well.