Perfect for storage that changes little.

Used car storage for music, perfectly meets this key imperative of congestion. It is connected permanently to a USB socket in the center armrest, and in this framework, it is the job. As I add / remove just one album time to time, its contents change very little.
But beware, if you want this key to the most common storage, with many exchanges of large files, it is very slow, especially in writing, with just 5-6Mo / s (and it may come down to 4 with writing multiple small files).

In short, for my specific use I do not need more, the size being the first criterion of choice, but for more regular use, I greatly recommend other faster keys.