The only way you can play media from a nas at the moment as theninjajedi has suggested is to find a way to use playto to send it to the xbox as this is supported.
Adding usb storage to xbox one.
The xbox one can actually support up to two 256gb or larger usb.
Currently there is no external storage options on the xbox one and to be honest i doubt that they ll support nas for things like games etc.
If the external drive meets the requirements the following will appear on screen the first time the drive is connected to the xbox one.
Add external drive to xbox one for more storage first fire up your xbox one and plug in the drive you want to use into an available usb port on the console.
External usb hard drives can now be used as storage space on the xbox one to configure an external usb hard drive for use on the xbox one the usb drive must be usb 3 0 and have at least 256gb of space.
Connect the drive to a vacant usb port using the included cable.
Microsoft s only caveats for what the xbox one will support is that it has to be at least 256gb in size and be usb 3 0 compatible.
With a drive in hand it s now time to connect it to xbox one.
A message will pop up on screen to show it recognises that.
Plug an external hard drive into your xbox one via a usb cable and assuming the drive is fast enough the xbox one will be able to install games to that drive.
Once automatically detected follow the on screen prompts permitting.
After that you ll be prompted to.
Adding an external hard drive the easy microsoft approved way to expand your xbox one s hard drive space is to add an external hard drive.
This means you ll be able to keep everything you have.