The simplest long-term consumer approach to digital media is to just hold a list of the titles of the stuff you like, and assume you can download any item from it at any time if you want access to it. You don't need to worry about keeping a private multi-gigabyte storage intact and accessible over decades nor access control and rights management arrangements with a single commercial entity that might not exist in ten years. Unfortunately for commercial content providers, this approach is basically equivalent to "pirate everything, all the time".