If you are using Wantedly People with wantedly account-
The card data will be automatically updated and can be used as back up, because Wantedly People organizes cards by saving the data to the account.
You can also view the same card data even if you change the mobile device, when you use Wantedly People with Wantedly account.
If you don't have a Wantedly account-
We recommend to make an account, so that you can take back ups for just in case.
Make your account from here.
NOTE: The card data will be saved in mobile device before the account is linked. Therefore if you don't make an account before you change your device, your card data will be lost.