To change your Apple ID email without losing data, go to iforgot.apple.com website if you’ve forgotten your credentials. Otherwise, sign in to appleid.apple.com, go to "Sign-In & Security," and select "Apple ID." Enter your new email and verify it. Ensure you’re signed out of Apple services on all devices before updating. After changing, log back in using the new email. Your data, including iCloud, purchases, and subscriptions, remains intact as long as you use the same password. If issues arise, visit iforgot.apple.com for account recovery options.