First, you can transfer contacts via SIM Card. Here's how:
1. On your old phone, export contacts to the SIM card. This option is usually available in the contact settings.
2. Remove the SIM card from the old phone and insert it into your wife's phone.
3. On your wife's phone, import contacts from the SIM card. This option is typically available in the contacts or phone settings.
If both old phones have SD card support, you can use an SD card to transfer photos, videos, and other files as below:
1. Insert an SD card into the old phone.
2. Use the file manager on the old phone to copy the data you want to transfer (e.g., photos, and videos) to the SD card.
3. Remove the SD card from the old phone and insert it into your wife's phone.
4. Use the file manager on your wife's phone to copy the data from the SD card to the desired location on your wife's phone.
And you can also use a third-party tool like Coolmuster Mobile Transfer, MobiKin Transfer for Mobile, etc. to help you transfer data between them. Since they are both running on Android OS, you can transfer data like contacts, text messages, photos, video, music, apps, books, call logs between them from the computer. However, such a tool is not free. About the details, you can search online. Hope this will be your help.