If you just want to backup your Yahoo email, you can try:
- Print a hard copy
- Forward a single email to another email address
- Download your email from Yahoo Mail into a third-party app
- Copy and paste each email that you want saved into a text editor
- Launch Yahoo email and sign in.
- Click on the Contacts tab.
- Click the Actions dropdown box.
- Choose Export.
- Click Export Now next to "Yahoo! CSV" which is the type of program to which you want to export your contacts.
- After clicking Export Now, you will see a verification code. Write it in the text box above the security code box and then click Export Now.