There are three ways to upload files (two of which use the desktop app): You can simply drag a file, a folder, or multiple files or folders to the cloud icon to upload them to your Amazon Cloud Drive.

Amazon Prime Video Direct is a service that allows creatives of any capacity to upload their movies and TV shows to Prime and earn money too.

Just download the .mobi file and install the Send to Kindle app on your computer. The latter is available for OS X and Windows, and will upload your personal files to Amazon's Whispernet network.

But there's an absolutely crucial difference. Amazon allows you, personally, to upload your music files to a digital locker and then play them back through a browser or an Android app.