To redeem a Fortnite gift card on Xbox, follow these steps:
1. Power on your Xbox console and sign in to your Xbox Live account.
2. Press the Xbox button on your controller to open the guide.
3. Navigate to the "Store" tab using the D-pad or left stick.
4. Select the "Use a code" option.
5. If you have not used the Xbox code before, you may need to enter the 25-character code manually. Use the on-screen keyboard to input the code accurately and select "Enter."
6. If your Fortnite gift card has a QR code, select the "Scan QR code" option. Use your Kinect sensor or a QR code reader to scan the code.
7. Once the code is recognized or entered correctly, the system will verify and apply the gift card value to your Xbox account.
8. You can now use the funds from the Fortnite gift card to make purchases within Fortnite or other supported games and content on the Xbox Store.
Remember, Fortnite gift cards can only be redeemed on an Xbox console with an active Xbox Live account. Ensure that you are connected to the internet during the redemption process for a smooth transaction.