Azure Files vs Azure NetApp Files: Which One Should You Choose?

Performance tiers, protocol support, dual-protocol capability, pricing models, SAP/Oracle/HPC suitability, data management features, and the decision framework that maps each workload type to the right service — with step-by-step setup procedures for both.

FA

Francis Avorgbedor

Azure Engineer

July 15, 2026

20 min read

Azure Storage · Architecture

4

Azure Files tiers: Premium SSD, Standard Hot, Cool, Tx Optimized

3

ANF performance tiers: Standard, Premium, Ultra — all SSD-backed

4TiB

ANF minimum provisioning — significant cost floor for small workloads

Dual

ANF serves the same data via SMB and NFS simultaneously — AF cannot

Introduction

Two Services, One Surface Area — Completely Different Purposes

Microsoft offers two fully managed, enterprise-grade file storage services in Azure. They share a surface area — both serve file shares over standard protocols, both run on managed infrastructure, and both integrate with Microsoft Entra ID. Beneath that surface they are different products built for different purposes, priced differently, scaled differently, and appropriate for different workloads.

The wrong choice between them is not a minor optimisation issue — it is the difference between running SAP HANA successfully at sub-millisecond latency and running it on infrastructure that cannot meet the application's I/O requirements, or between paying $0.06 per GiB for a file server workload that would perform equally well at $0.26 per GiB on Azure NetApp Files' cheapest tier. The decision deserves a proper framework. This article provides one.

What Each Service Actually Is

The comparison starts at the service identity level. Azure Files and Azure NetApp Files are architecturally different products that happen to serve data via similar protocols.

Figure 1 — Service architecture: how Azure Files and Azure NetApp Files differ at the foundation

Azure Files is built on Azure Storage; Azure NetApp Files runs NetApp ONTAP technology as a first-party Azure service — the data management capabilities are categorically different

Azure Files — built for

The general-purpose enterprise file server

✓Replacing on-premises Windows file servers

✓Departmental shares and home directories

✓Hybrid deployments with Azure File Sync

✓Container persistent volumes (AKS)

✓Applications using standard SMB paths

✓Cost-sensitive workloads needing scale

✗Not suitable for sub-ms NFS workloads (SAP/Oracle)

✗No dual-protocol (SMB + NFS on same dataset)

Azure NetApp Files — built for

The high-performance enterprise NAS

✓SAP HANA and SAP application layer

✓Oracle databases on NFS

✓High-performance computing (HPC) clusters

✓Large-scale VDI (FSLogix containers)

✓Media render farms requiring high throughput

✓Dual-protocol: Windows + Linux clients, same data

✗Not cost-effective for general file shares

✗4TiB minimum makes small workloads expensive

Performance: Where the Gap Is Largest

Performance is where the decision between Azure Files and Azure NetApp Files is clearest. On latency and throughput for demanding workloads, Azure NetApp Files is categorically different from Azure Files — not better by a margin, but different in kind.

Figure 2 — Performance comparison: Azure Files Premium SSD vs ANF Standard / Premium / Ultra

Both services achieve sub-millisecond minimum latency — the key differences are throughput scaling, NFS protocol breadth, dual-protocol, and SAP certification

ANF Performance Tiers — The Capacity Pool Model

ANF performance is provisioned at the capacity pool level, not per volume. You provision a pool of a given size and tier, then create volumes within that pool. Throughput = pool size (TiB) × tier rate (MiB/s/TiB). Plan your pool size based on your throughput requirement, not just capacity.

Figure 3 — ANF capacity pool model: how provisioning drives performance and cost

ANF throughput = pool size (TiB) × tier rate (MiB/s/TiB) — size the pool to meet your throughput target, not just your capacity requirement

Full Feature Comparison

Feature / Dimension	Azure Files	Azure NetApp Files
Protocol Support
SMB versions	SMB 2.1, 3.0, 3.1.1	SMB 3.0
NFS versions	NFS 4.1 only	NFSv3 and NFSv4.1 — both supported
Dual protocol (SMB + NFS same volume)	✗ Not supported	✓ Full dual-protocol — unique ANF advantage
Performance
Minimum latency	<1ms (Premium SSD) · ~10ms (Standard HDD)	<1ms on all tiers (all SSD-backed)
Max IOPS	100,000 per share (SSD)	128,000+ per TiB provisioned (Ultra)
Max throughput	10 GiB/s per share	128 MiB/s per TiB (Ultra) · scales with pool
Authentication & Access Control
Identity providers	Entra ID Kerberos · AD DS · Managed Identity	AD DS · FreeIPA · OpenLDAP · Red Hat Directory Server
Cloud-native identity (no DC required)	✓ Entra ID Kerberos — cloud-only identities	✗ Requires AD DS or LDAP directory
POSIX-compliant permissions	~ Limited via NFS 4.1	✓ Full POSIX compliance
Data Management
Volume snapshots	Azure Backup snapshots · manual share snapshots	ONTAP-native snapshots — near-instant at any size
Volume clones	✗ Not supported	✓ Instant space-efficient clones from snapshots
Cross-region replication	✗ Not native — use Azure Backup for DR	✓ Cross-region replication built in
Storage efficiency (dedup/compression)	✗ Not available	✓ ONTAP deduplication and compression
Cool Access (auto tiering to Blob)	✗ Per-file auto tiering not available	✓ ANF Cool Access (Standard/Premium/Ultra)
Redundancy & Availability
Redundancy options	LRS · ZRS · GRS · GZRS	LRS · ZRS (Elastic ZRS) · Cross-zone/region replication
SLA	99.99% (ZRS) · 99.9% (LRS)	99.99% on all tiers
Pricing & Provisioning
Minimum provisioning	1 GB — no floor	4 TiB minimum capacity pool
Billing model	Provisioned v2 (predictable) or pay-as-you-go	Hourly capacity pool billing
Approximate cost (Standard SMB)	~$0.06/GiB/month (Standard Hot)	~$0.26/GiB/month (Standard ANF) — 4× more expensive
Hybrid & Integration
Azure File Sync	✓ Full AFS support — cloud tiering, branch cache	✗ Not supported with AFS
SAP HANA certification	✗ Not certified	✓ Premium and Ultra tiers certified
AKS persistent volumes	✓ Standard SMB/NFS driver	✓ ANF Trident CSI driver

The Decision Flowchart

Figure 4 — Workload decision flowchart: Azure Files or Azure NetApp Files?

Real Workload Scenarios

→ Azure NetApp Files

SAP HANA migration to Azure

SAP HANA requires sub-millisecond NFS latency and specific throughput guarantees for data and log volumes. ANF Premium and Ultra tiers are SAP certified. Azure Files is not. If your workload is SAP HANA, the answer is ANF — there is no choice to make.

→ Azure Files

15TB NAS replacement

Departmental shares for Finance, HR, and Projects — accessed via mapped drives by Windows users. Azure Files Premium SSD for Finance, Standard Hot for the rest. Azure File Sync for branch office caching. ANF would cost 4× more per GiB with no performance benefit for this workload.

→ Azure NetApp Files

Large-scale VDI with FSLogix

VDI environments with thousands of users require high IOPS for user profile containers and low latency for session startup. ANF handles thousands of concurrent users with sub-second latency at scale. FSLogix on Azure Files works for smaller deployments but hits ceilings at enterprise scale.

→ Azure NetApp Files

Mixed Windows + Linux — dual-protocol

Engineering environments where Windows developers access files via SMB and Linux build servers access the same data via NFS. Only ANF supports serving the same dataset simultaneously via both protocols. Azure Files requires separate shares for SMB and NFS.

→ Azure Files

Branch office hybrid caching

Multiple branch offices needing fast local file access. Azure File Sync caches hot files on Windows Server at each branch with authoritative data in Azure Files. ANF does not support Azure File Sync — for hybrid deployments Azure Files is the only correct choice.

→ Azure NetApp Files

HPC — genomics, seismic, financial modelling

HPC workloads require extreme throughput for parallel reads across compute clusters. ANF Ultra at high provisioned capacity provides the throughput density needed. Azure Files does not match ANF's throughput scaling model for data-intensive HPC requiring hundreds of MiB/s.

Pricing: The Most Important Reason Most Workloads Should Use Azure Files

Azure NetApp Files is a premium-priced service. That pricing is justified for the workloads it is designed for. It is completely unjustified for general file shares that would perform identically on Azure Files at a fraction of the cost.

Figure 5 — Monthly cost comparison: Azure Files vs ANF for a 10TiB workload

Azure Files Standard Hot at ~$614/month vs ANF Standard at ~$2,662/month for 10TiB — use ANF only where its unique capabilities are genuinely required

⚠ The 4TiB Minimum — ANF's Most Important Cost Constraint

Azure NetApp Files requires a minimum capacity pool of 4TiB. At Standard tier, that is approximately $1,075/month as a floor — before you store a single file. Azure Files has no minimum — you can start at 1 GB and pay proportionally.

ANF is almost never the right choice for workloads under 4TiB. For workloads between 4TiB and 20TiB, the cost premium must be justified by a specific capability requirement — dual-protocol, SAP certification, or ONTAP data management — before committing.

Step-by-Step Setup

Setting Up Azure Files for Enterprise

1

Azure Portal → Storage accounts → Create

Create the storage account with the correct type

For Premium SSD shares: create a FileStorage storage account. For Standard HDD: create a General Purpose v2 (StorageV2) account. Set redundancy upfront — ZRS is recommended for production. Enable infrastructure encryption if your compliance requirements demand double encryption at rest.

2

Networking → Private endpoint connections → Add

Configure Private Endpoint and disable public network access

Create a Private Endpoint in the target VNet. Configure the private DNS zone (privatelink.file.core.windows.net). Verify with Test-NetConnection that the storage account resolves to a private IP. Only then disable public network access. Enabling Private Endpoints after the AFS agent is registered requires agent re-registration.

3

Identity → Active Directory → Enable

Enable identity-based authentication

For Entra ID Kerberos (cloud-native, no DC required): Set-AzStorageAccount -EnableAzureActiveDirectoryKerberosForFiles $true. Assign RBAC roles — Storage File Data SMB Share Contributor for read/write users. For on-premises AD DS: run the AzFilesHybrid PowerShell module to domain-join the storage account. Test access with a real user before proceeding.

4

Storage account → File shares → Add share

Create the file share with correct quota and settings

Create the file share at the provisioned size. Enable soft delete (14 days recommended). Configure Azure Backup with a daily snapshot policy. If using Azure File Sync: do not set the share access tier before registering the server endpoint — the AFS agent manages tiering.

5

Portal → File share → Connect → Generate script

Mount the share and verify access

Windows: use the generated PowerShell mount script from the portal Connect blade — it uses the storage account FQDN and authenticates via the configured identity method with no credential prompt on Entra-joined devices. Linux: mount via CIFS with Kerberos security mode. macOS: open smb://<storage>.file.core.windows.net/<share>. Verify read, write, and ACL behaviour with a real user account from each client OS in scope before cutover.

Setting Up Azure NetApp Files

ANF provisioning differs fundamentally from Azure Files. There is no storage account — ANF uses a dedicated resource type (NetApp Account) with capacity pools and volumes as the hierarchy. The setup sequence must be followed exactly.

Figure 6 — ANF resource hierarchy: the provisioning structure before any data can be stored

1

Subscription → Resource providers → Microsoft.NetApp → Register

Register the ANF resource provider and create the NetApp Account

Register Microsoft.NetApp as a resource provider in your subscription. Then create a NetApp Account in the target region. Name it meaningfully — for example corp-anf-uksouth. One NetApp Account per region is typically sufficient for most enterprise deployments.

2

NetApp Account → Capacity pools → Add pool

Create the capacity pool — size based on throughput, not capacity

Choose the tier (Standard/Premium/Ultra) based on your throughput requirement. Calculate: required throughput (MiB/s) ÷ tier rate (16/64/128 MiB/s per TiB) = minimum pool size in TiB. Round up to the nearest TiB with a floor of 4TiB. Enable manual QoS if you need to allocate throughput unevenly across volumes within the pool.

3

VNet → Subnets → Add subnet → Delegate to Microsoft.NetApp/volumes

Delegate a subnet for ANF exclusive use

ANF requires a dedicated delegated subnet — it cannot share a subnet with other resources. Create a /24 or /26 subnet dedicated to ANF and delegate it to Microsoft.NetApp/volumes. ANF volumes are accessed from other subnets in the same VNet or peered VNets. Note: ANF cannot be accessed directly from the internet — VPN or ExpressRoute is required for on-premises access.

4

NetApp Account → Active Directory connections → Join

Configure Active Directory connection (SMB and dual-protocol volumes only)

For SMB or dual-protocol volumes, configure an Active Directory connection under the NetApp Account — provide your AD domain name, DNS server IPs, and credentials with permission to join computers to the domain. ANF creates a computer object in AD for each SMB volume. NFS-only volumes use export policies and do not require an AD connection.

5

Capacity pool → Volumes → Add volume

Create volumes within the capacity pool

Create individual volumes within the capacity pool. For each volume: set quota size, select protocol (NFS/SMB/Dual), configure export policy for NFS (IP ranges, access rules), and set snapshot policy if required. For dual-protocol volumes: select both SMB and NFS — ANF handles the permission mapping between NTFS and Unix security styles automatically.

6

Volume → Mount instructions → copy mount target IP

Mount the ANF volume on client systems

ANF provides a dedicated mount target IP for each volume. Find it in the volume's Mount Target section in the Azure portal. For NFS, use the optimised mount options shown below. For SMB, map as a network drive using the SMB server name shown in the SMB Mount Target. Validate latency and throughput against your expected workload profile before cutover.

BashANF NFS 4.1 mount — optimised for SAP HANA and HPC workloads

# Mount ANF NFS 4.1 volume — options tuned for high-throughput workloads
sudo mount -t nfs \
  -o rw,hard,rsize=65536,wsize=65536,vers=4.1,tcp \
  <anf-mount-target-ip>:/<volume-path> \
  /hana/data

# Add to /etc/fstab for persistent mount on reboot
<anf-mount-ip>:/<volume-path> /hana/data nfs4 rw,hard,rsize=65536,wsize=65536,vers=4.1,tcp 0 0

# Verify mount and run throughput baseline
df -h /hana/data
fio --name=read_test --filename=/hana/data/test --size=10G \
  --bs=1M --rw=read --ioengine=libaio --iodepth=32

The decision in one table

If your workload is…	Choose Azure Files	Choose Azure NetApp Files
SAP HANA (data + log volumes)	✗ Not certified	✓ ANF Premium or Ultra — only option
Oracle database on NFS	✗ NFS 4.1 only, not recommended	✓ ANF with NFSv3 or 4.1 — certified
Windows file server replacement	✓ Azure Files — right tool, right price	✗ 4× more expensive, no benefit
Branch office hybrid caching	✓ Azure Files + Azure File Sync	✗ AFS not supported on ANF
Large-scale VDI (>500 users)	~ Works, hits ceiling at scale	✓ ANF Premium — handles thousands of users
Mixed Windows + Linux same dataset	✗ No dual-protocol	✓ ANF dual-protocol — only option
HPC / seismic / genomics	~ Possible for moderate scale	✓ ANF Ultra — highest throughput density
AKS persistent volumes	✓ Standard CSI driver — simpler setup	✓ Trident CSI — better for high-IOPS AKS
Cost-sensitive workload <4TiB	✓ Azure Files — no minimum	✗ 4TiB pool minimum = unjustifiable cost
Instant volume clones for dev/test	✗ Not supported	✓ ONTAP space-efficient clones

Conclusion

Azure Files is the correct choice for the vast majority of enterprise file storage workloads — simpler to deploy, significantly cheaper, integrates with Azure File Sync for hybrid scenarios, and handles general departmental shares, home directories, application shares, and AKS persistent volumes with appropriate performance.

Azure NetApp Files is the correct choice for a specific, well-defined set of demanding workloads — SAP HANA, Oracle on NFS, large-scale VDI, HPC clusters, and dual-protocol environments where the same data must be served via both SMB and NFS simultaneously. If your workload has one of those requirements, ANF is not optional. If it does not, ANF's cost premium is not justified.

Key Takeaways

✓Azure Files is correct for the vast majority of enterprise file storage workloads — use it as your default.

✓ANF is the only Azure-native option for SAP HANA, Oracle NFS, large-scale VDI, and dual-protocol (SMB + NFS same volume) workloads.

✓ANF throughput = pool size (TiB) × tier rate (MiB/s/TiB) — always size your pool to your throughput requirement, not just capacity.

✓The ANF 4TiB minimum (~$1,075/month at Standard tier) makes it uneconomical for workloads under 4TiB or without genuine need for ANF's specific capabilities.

✓Azure File Sync (hybrid caching for branch offices) only works with Azure Files — not with ANF.

✓ANF requires a dedicated delegated subnet and cannot be accessed directly from the internet — plan VPN or ExpressRoute for on-premises access.

✓Always validate latency and throughput against your expected workload profile before cutover — use fio for NFS and the ANF performance benchmarks for sizing confirmation.

Frequently Asked Questions

Can I use Azure Files for SAP HANA?

No. Azure Files is not SAP HANA certified. SAP HANA requires sub-millisecond NFS latency and specific throughput guarantees for data and log volumes. Azure NetApp Files Premium and Ultra tiers are the only Azure-native options that are SAP HANA certified and meet these requirements.

What is dual-protocol and why does it matter?

Dual-protocol means a single volume can be accessed simultaneously via both SMB (Windows) and NFS (Linux/Unix) protocols, with a unified permission model. Only Azure NetApp Files supports this. Azure Files requires separate shares for SMB and NFS workloads, meaning separate data copies. If your environment has both Windows and Linux clients that need access to the same dataset, ANF is the only correct choice.

Can I use Azure File Sync with Azure NetApp Files?

No. Azure File Sync is only compatible with Azure Files. If you need hybrid branch office caching where hot files are cached locally on Windows Server and cold data is tiered to the cloud, Azure Files with Azure File Sync is the only Azure-native solution.

Why is ANF minimum 4TiB and why does this matter?

ANF billing is based on provisioned capacity pool size, not on what you actually store. The minimum pool size is 4TiB. At Standard tier, that is approximately $1,075/month — regardless of whether you store 100 GB or 4TiB in that pool. This makes ANF uneconomical for small workloads. Azure Files has no minimum and charges for what you actually store.

Which service should I use for AKS persistent volumes?

Both are supported. Azure Files uses the standard SMB/NFS CSI driver and is the simpler option for most AKS persistent volume workloads — especially ReadWriteMany volumes where multiple pods need concurrent access. Azure NetApp Files with the Trident CSI driver is the better choice for high-IOPS AKS workloads where sub-millisecond storage latency is critical, such as database containers or high-throughput data processing pods.

Related FAVRITE Articles

• Understanding Azure File Shares for Enterprise Workloads
• Choosing the Right Azure Storage Tier for Large File Migrations
• How to Plan a 15TB Migration from NAS to Azure Files
• Lessons Learned from a 15TB QNAP-to-Azure Storage Migration
• Behind the Scenes of a Large-Scale Azure File Share Migration