I bought a premium subscription so I could listen to my playlists on my mobile.

Less than half the tracks will sync - apparently my android device has to be connected by wifi to my computer to enable the rest to be sync'd.

EDIT: Sorry, error in post, picked up by Brainfish - issue is that PC must be connected wirelessly to network, not the android device.

My computer does not have a wifi card.

Therefore I cannot listen to my music.

I need to be able to sync via USB, as can be done with Apple devices. If this is not possible, I would like an explanation of the technical barrier. I note that similar questions have been asked with no reply in the past, which is poor.

If this is not solved in the immediate future I will have to cancel my subscription to premium, and I suspect there are thousands of other spotify android users in the same predicament who feel that the service they were promised is not really being delivered.