HI Chris,
will you be adding a Home button (preferably next to Back, seems an exact match for the empty spot...) in the Mediaplayer? We now need to click Back may times to go back to the root and change Drives.
(btw clicking Back reloads the Media player with a somewhat off focus sliding upwards, leaving the Back-button out of view. So now I not only have to click Back several times too many, but also scroll-back the Back button in view.)
deep nesting forcing to click Back several times to go back Home (also: screen estate is too small to show full path, maybe make this adaptive to the nesting?)

clicking Back once: Back is out of view, forcing the added scroll action

Hope you can do it,
Cheers,
Marius