If compute yesterday was where data gets "processed," today is the story of "where you put it." AWS storage looks like it has a lot of varieties, but there are really only three ways to hold data — Object, Block, and File. These three map to S3, EBS, and EFS/FSx, respectively. The CLF-C02 exam asks, again and again, "which data goes in which storage."
Today we'll lay out how the three storage approaches differ, and how S3's storage classes are divided by "how often you pull the data out."
First, the big picture. There are three ways to hold data.