Downloading course material over wifi - still using cellular data to play
I click the cloud and download the audio files at home on wifi.
I listen to them in the car on the way to and from work.
When I play one I have already downloaded it had to buffer the file while downloading again over cellular.
I'm 10 days into a new month on my data plan and already used 1GB.
The audio is the ONLY thing I have used in the last 10 days.
Why isn't iTunes U playing my downloaded file?
Thanks.
iOS 7.0.4