Quick Answer
Azure File Sync is the correct choice because it enables hybrid cloud tiering, allowing on-premises Windows file servers to cache only frequently accessed files locally while storing all files in Azure Files. This cloud tiering feature automatically moves cold data to the cloud, freeing up local storage and ensuring low-latency SMB access for users to hot files. On the AZ-305 exam, this scenario tests your understanding of hybrid storage integration, often contrasting Azure File Sync with services like Azure NetApp Files or Azure Blob Storage, which lack native SMB caching on Windows Server. A common trap is selecting Azure Files alone, but without the sync agent, it cannot cache locally. Memory tip: think “sync for cache” — Azure File Sync is the only service that combines a cloud file share with an on-premises cache, making it the go-to for hybrid SMB workloads.
This AZ-305 practice question tests your understanding of design data storage solutions. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company is designing a hybrid storage solution to connect on-premises file shares to Azure. They need to cache frequently accessed files locally for low-latency access while storing all files in Azure. The solution must support SMB protocol and integrate with existing Windows file servers. Which Azure service should they use?
Azure Blob Storage with NFS 3.0 support
Why wrong: Blob Storage with NFS does not provide on-premises caching and file sync.
Azure Files
Why wrong: Azure Files alone is cloud-only, no local caching.
Azure File Sync
Azure File Sync provides cloud tiering and local caching with SMB.
Azure NetApp Files
Why wrong: Azure NetApp Files is a file service but not designed for hybrid caching with on-premises servers.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Azure File Sync
Azure File Sync is the correct choice because it enables caching of frequently accessed files on-premises via a sync agent installed on Windows Server, while all files are stored in Azure Files. This provides low-latency access for local users and supports SMB protocol, seamlessly integrating with existing Windows file servers through a cloud tiering feature that keeps only hot files locally.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Azure Blob Storage with NFS 3.0 support
Why it's wrong here
Blob Storage with NFS does not provide on-premises caching and file sync.
Azure Files
Why it's wrong here
Azure Files alone is cloud-only, no local caching.
Azure File Sync
Why this is correct
Azure File Sync provides cloud tiering and local caching with SMB.
Related concept
Read the scenario before looking for a memorised answer.
Azure NetApp Files
Why it's wrong here
Azure NetApp Files is a file service but not designed for hybrid caching with on-premises servers.
Common exam traps
The trap here is that candidates often confuse Azure Files (a cloud-only SMB share) with Azure File Sync (which adds local caching and sync capabilities), leading them to select Azure Files without recognizing the requirement for on-premises low-latency access.
Detailed technical explanation
Azure File Sync uses a cloud tiering policy that automatically moves infrequently accessed files to Azure Files, replacing them with a reparse point on the local volume. When a user accesses a tiered file, the sync agent transparently recalls it from Azure, ensuring minimal latency for hot data. In real-world scenarios, this allows organizations with limited on-premises storage to maintain a small cache while leveraging Azure's scalability for full data retention.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
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FAQ
Design data storage solutions — This question tests Design data storage solutions — Read the scenario before looking for a memorised answer..
The correct answer is: Azure File Sync — Azure File Sync is the correct choice because it enables caching of frequently accessed files on-premises via a sync agent installed on Windows Server, while all files are stored in Azure Files. This provides low-latency access for local users and supports SMB protocol, seamlessly integrating with existing Windows file servers through a cloud tiering feature that keeps only hot files locally.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This AZ-305 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-305 exam.
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