[Euripides]

I didn't upload my music library on the cloud so I don't have conclusive answer to the question. However, if we are talking about music player here I mainly use foobar2k. I use iTunes mainly for updating firmware and importing stuff but not music. I have a dedicated player to play music from so no need to import songs on my tablet and smart phone.

Just in case I would want to stash in the cloud, I'd probably use Amazon services as well. I've been hearing great things about their service.