Azure Blob Storage is a cloud service for storing unstructured binary data. It is a part of the Microsoft Azure family of cloud services. Blobs can be of any file type. azure blobs can be Block or Page oriented. Block blobs are optimized for sequential read, while Page blobs are optimized for random read. A single Block Blob can be up to 200 GB in size and a single Page blob - up to 2 TB.
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