You can also select a file from the Playlist. The Playlist offers a common
space for the connected devices to share files. Tap on the plus sign (+) to
create new lists.
To enable Digital Media Server, tap on Settings at the upper right
corner and tick Digital Media Server Settings to allow the other
connecting devices to access media files on your Transformer. You can
also select the location of the file you want to share.
ASUS Transformer Manual