The correct answer is Azure Blob Storage.

It is the object storage service designed for large amounts of unstructured data and for binary large objects. It supports scenarios such as serving images and videos, backups and archives, and analytics data lakes, which makes it the natural fit for the phrase general purpose file storage for binary large objects.

Azure File Storage provides managed file shares accessible over SMB or NFS and is intended for lift and shift scenarios and applications that require file system semantics. It is not an object store optimized for large unstructured blobs.

Azure Disk Storage is block storage that attaches to virtual machines for persistent OS and data disks. It is designed for VM workloads and not for general purpose blob storage.

Azure Queue Storage is a messaging service used to decouple application components and to pass messages between services. It is not meant for storing binary large objects.

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