Microsoft Azure Essentials Fundamentals of Azure Second Edition e-optimized 5x11 pdf

https://[storage account name]/blob.core.windows.net/[container]/[blob name] 
The Blob service supports only a single physical level of containers. However, it supports the 
simulation of a file system with folders within the containers by allowing blob names to contain the '/' 
character. The client APIs provide support to traverse this simulated file system. For example, if you 
have a container called animals and you want to group the animals within the container, you could 
add blobs named cats/tuxedo.png, cats/marmalade.png, and so on. The URL would include the entire 
blob name including the “subfolder,” and it would end up looking like this: