Hello. I am an Amazon prime member. I am an amazon drive user. I thought that the unlimited storage for amazon drive was part of an amazon prime membership, but I just got a renewal notification from amazon drive that I will owe money based on the amount of storage I need. I’m confused.
Amazon Prime includes unlimited photo storage (jpg, bmp, gif, png, etc…), but excludes all other types of files. When you look at your storage details on Amazon’s web client, you can see their accounting of the types of files you have: https://www.amazon.com/clouddrive/managestoragev2
Take a look at that page. It should answers some questions about the content of your Amazon Drive.