Blob vs Files vs Table vs Queue: which Azure Storage service fits the workload
Verdict: Choose Blob for unstructured objects such as images, video and data-lake files; Files for SMB/NFS-mounted file shares; Table for schemaless key/value lookups by a single identifier; Queue for reliable asynchronous messaging between decoupled components.
| Criterion | Blob storage | Azure Files | Table storage | Queue storage |
|---|---|---|---|---|
| Data model | Binary large objects (blobs) of unstructured data | Files and folders in a mounted network share | NoSQL key/value rows, schemaless design | Messages queued for later processing |
| Access/protocol | Blob storage API, read/write over HTTP | SMB or NFS mount, used like a network drive | Table API, point lookups by partition and row key | Queue API, enqueue and dequeue messages |
| Best for | Images, video, backup archives, streaming media, and data-lake analytics | Lift-and-shift of an on-premises departmental file share | High-volume, schema-flexible lookups by a single identifier with no joins | Decoupling application components with reliable async messaging |
Rules
- Use Blob storage for large volumes of unstructured data such as images, video, and backup archives read and written through a storage API.
- Use Azure Files for a cloud network file share that existing SMB or NFS clients mount as a drive.
- Use Table storage for high-volume, schema-flexible key/value lookups by a single identifier, with no joins.
- Use Queue storage to hold messages reliably for asynchronous communication between decoupled application components.
- Blob storage also supports big data analytics through Azure Data Lake Storage and is the fit for streaming video and audio to consumers.
- Table storage's schemaless key/attribute rows suit flexible datasets such as user data, address books, and device metadata.
Traps
- Table storage rows are key/value data, not a normalised schema joined by foreign keys; it has no relational join support.
- Azure Files is not an object store reached through a Blob API; it is an SMB/NFS mounted network share.
- Blob storage is not a keyed lookup store for individual small records; it targets large unstructured objects.
- Queue storage holds small messages (up to 64 KB), not large media files for streaming.