Hello TheGent111,
If your Apple ID password is not working you can use these steps to reset it:
1. Tap Settings > your name > Password & Security.
2. Tap Change Password.
3. Enter your current password or device passcode, then enter a new password and confirm the new password. Forgot your password?
4. Tap Change or Change Password.
Change your Apple ID password
If you're using the two-factor authentication security on your Apple ID account, make sure you're entering your verification code when you try to sign in as well.
Get a verification code and sign in with two-factor authentication
Once you're able to get signed in on your iPhone 7, you can use these steps to change your storage plan:
1. Go to Settings, then tap your name.
2. Tap iCloud, then tap Manage Account Storage or Manage Storage. Or scroll down and tap Upgrade to iCloud+.
3. Tap Buy More Storage or Change Storage Plan.
4. Choose a plan and follow the onscreen instructions.
Upgrade to iCloud+
Once you have an adequate storage plan to start backing up the device, you can then navigate to Settings > name at the top > iCloud > iCloud Backup and select Backup Now to create a backup.
How to back up your iPhone or iPad with iCloud
Cheers!
