You are designing an Azure application that will use a worker role. The worker role will create temporary files.
You need to minimize storage transaction charges.
Where should you create the files?

A.
In Azure local storage

B.
In Azure Storage page blobs

C.
In OneDrive

D.
In Azure Storage block blobs

Explanation:
Local storage is temporary in Azure. So, if the virtual machine supporting your role dies and cannot recover,
your local storage is lost! Therefore, Azure developers will tell you, only volatile data should ever be stored in
local storage of Azure.
http://www.intertech.com/Blog/windows-azure-local-file-storage-how-to-guide-and-warnings/
http://blog.codingoutloud.com/2011/06/12/azure-faq-can-i-write-to-the-file-system-on-windowsazure/