to delete the backups, go to iTunes>Preferences>Devices. All iPhone backups will be listed here. Highlight them, then hit Delete.

But if you're using a Mac, I would first try to see if you can find the password with your keychain access app, here's a link that could help out. I have not tried so I don't know if it works, but give it a try. Good luck!

To delete the backups, go to iTunes>Preferences>Devices. All iPhone backups will be listed here. Highlight them, then hit Delete.

But if you're using a Mac, I would first try to see if you can find the password in your Keychain (from discussions.apple.com):

• Go to the "keychain access " app.
• Under "Keychains" select "Login"
• Under "Category" select "Passwords"
• Scroll down and look for "iPhone Backup"
• Double click and a window opens
• Check the box that says "Show Password"
• A window pops up asking for your OS X account password
• Type in that password and voila!