Cheapest type of storage. Pay Per GB (~1.8 cents per GB)
Reserves storage capacity in advance, optimized to virtual hard disks.
Hot - For real time access. Cool - For files which are rarely accessed. Archive - For long time storage, which are very rarely accessed.
Standard and Premium - Premium has faster I/O and higher prices.
Prices can change depending upon location.
e.g South America costs more than East US
By default 3 copies are kept by Microsoft.
If one region goes down, then other region is used.