Can non-smart phones back up the numbers and text messages in the computer?

Yes, I recommend a free office platform for you. You can import the address book in your mobile phone to this platform for backup, or export it as a csv file suitable for your mobile phone. Another advantage of this platform is that it can not only be modified in batches in the computer, but also be a particularly convenient address book viewing platform, which is very convenient for searching, editing, texting and sending emails.