You add money to your nsave account by:
Click “Accounts” on the menu at the bottom of the screen
Select the currency you would like to move money from. You can change your currency by clicking on the red “USD/GBP/EUR Account” at the top right of your screen.
Click on “Deposit” at the bottom of the screen
Select “Card deposit”
Select the desired currency account you would like to add money to.
Select the currency of the card which you will to pay with (in the “this will cost” section)
Click “Continue” and confirm the transaction after reviewing the amount and fees