You may connect the USB stick to a different computer and check if it is visible. If yes, I suggest you to follow the steps in the following article and check if it helps.
Check out today’s Family Settings announcement for a full overview. Wish List notifications We’re excited to see everyone enjoying the Wish List feature on the Microsoft Store! The October 2019 Xbox Update enhances this feature with notifications to alert you when an item in your Wish List has a price discount.