You can move money out of your nsave investment account on the app by:
Click “Invest” on the menu at the bottom of the screen
Click on “Withdraw funds” on the bottom of the screen
Select the amount in USD you would like take out from the investment account
Select the desired account you would like to move money to. At the moment you are able to use your GBP or USD account only.
Confirm the transaction by clicking “Withdraw money” after reviewing the amount and fees.