filing sharing

You could try a power cycle and see if that sorts the issue out?
https://support.xbox.com/en-GB/xbox-one/console/power-cycle-console

So you're having issues adding them to Windows Media Player?

Hello Mitchell,

We thank you for bringing this inquiry to our forums community, and understand that this concerns an inability to access to items that your friend is sharing with you on your Xbox One console.

If you happen to be inquiring about Xbox One home console sharing, which allows an account to share games and subscriptions to an
Xbox One console and therefore allowing any account to sign in and use said content, then the IP address would not be the cause. If the console isn't recognizing your friend's account as the home console, you can attempt to
power cycle the console as already suggested, or have your friend sign into his account and check to ensure that they still show
as the home console.

Try this out for us and then let us know the results.

Best wishes!

Asking to share accounts is not allowed on the forums.

how do you upload stuff from your fileshare (halo reach) to your computer?