Setting up My Book LIve for Mac

if you are talking about the backup tab you used Smartware to backup your files

files were added to a hidden partition for the Smartware backup

you can locate by going //mybooklive/smartware

since you are using the drive for streaming media it’s better to transfer the files manually to the public folder on the MBL 

the backup is not for media streaming purposes, the hidden partition will avoid getting the data corrupted