Best hosts for in-game asset downloading

I'm looking to host in-game assets on a server for a game that could reach very high file size (game is for android/ios). It will allow users to choose whether or not they save these files locally or not. I already know that I will be using asset bundles and the WWW class. My problem is I do not know much about hosts for this sort of functionality. What are my options? I need a site that we can pay for that will hold these assets and reliably, in a reasonable time, let them be downloaded from the US/Canada regions.