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 setup procedures for both.

By Francis Avorgbedor | Azure Engineer  ·  July 15, 2026  ·  20 min read  ·  Azure Files · Azure NetApp Files · Architecture

FA

Francis Avorgbedor

Azure Engineer  ·  SEVENAI  ·  Azure Field Notes

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

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 Azure Active Directory. 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 post provides one.

What each service actually is — before comparing any feature

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

The fundamental difference: 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 that use 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 and matters most

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 — different in kind.

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

Both services achieve sub-millisecond minimum latency — the difference is in throughput scaling, NFS protocol breadth, dual-protocol capability, and SAP certification

Azure NetApp Files performance tiers — the capacity pool model explained

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. Every volume in the pool shares the pool's throughput budget, calculated as a function of provisioned capacity multiplied by the tier's per-TiB throughput rate. Understanding this model is essential — it means provisioning 4TiB at Ultra tier gives you 512 MiB/s of throughput, not a fixed number you configure separately.

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

ANF throughput = pool size (TiB) × tier rate (MiB/s/TiB). Increasing pool size increases throughput linearly — plan pool size based on your throughput requirement, not just capacity

Full feature comparison — every dimension that matters for enterprise decisions

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 (SSD Premium) · ~10ms (HDD Standard)	<1ms on all tiers (all SSD-backed)
Max IOPS	100,000 per share (SSD) · 35K+ with metadata cache	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
Cross-zone replication	✗ Use ZRS redundancy instead	✓ Asynchronous cross-zone replication
Storage efficiency (dedup/compression)	✗ Not available	✓ ONTAP deduplication and compression
Cool Access (auto tiering to Blob)	✗ Per-file auto tiering not available on Files	✓ 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 — mapping your workload to the right service

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

Real workload scenarios — which service for which situation

→ Azure NetApp Files

SAP HANA migration to Azure

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

→ Azure Files

15TB QNAP NAS replacement

Departmental shares for Finance, HR, Projects, and Shared — accessed via mapped drives by Windows users. Azure Files Premium SSD for Finance (latency-sensitive), 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 profile.

→ Azure NetApp Files

Large-scale VDI with FSLogix containers

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. ANF Ultra handles the most demanding VDI profiles; Premium is sufficient for most enterprise VDI deployments. FSLogix on Azure Files is viable for smaller deployments but hits performance ceilings at scale.

→ Azure NetApp Files

Mixed Windows + Linux environment (dual-protocol)

Engineering environments where Windows developers access files via SMB and Linux build servers access the same data via NFS require dual-protocol capability. Only ANF supports serving the same dataset simultaneously via both protocols. Azure Files requires separate shares for SMB and NFS, meaning separate data copies and synchronisation challenges.

→ Azure Files

Branch office file sharing with hybrid sync

Multiple branch offices needing fast local file access to centrally managed data. 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 where branch offices need local cache performance, 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 for HPC. Azure Files, while capable, does not match ANF's throughput scaling model for data-intensive HPC scenarios that require hundreds of MiB/s of sustained reads from a shared dataset.

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. The cost comparison is not close.

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

Azure Files Standard Hot costs approximately $614/month for 10TiB — ANF Standard costs approximately $2,662/month for the same capacity. Use ANF only where its unique capabilities are genuinely required.

⚠ The 4TiB minimum — the most important ANF 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. For workloads under 4TiB, or workloads that do not require ANF's specific capabilities, this minimum makes ANF uneconomical even if the feature set looks appealing. Azure Files has no minimum — you can start at 1GB and pay proportionally.

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

Step-by-step: setting up Azure Files for enterprise

1

Azure Portal · 5 minutes

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 recommended for production. Enable infrastructure encryption if your compliance requirements demand double encryption.

2

Before any mount · 20 minutes

Configure Private Endpoint and disable public network access

Create Private Endpoint in the target VNet. Configure private DNS zone (privatelink.file.core.windows.net). Verify with Test-NetConnection — confirm 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 configuration · 30–60 minutes

Enable identity-based authentication

For Entra ID Kerberos (cloud-native): Set-AzStorageAccount -EnableAzureActiveDirectoryKerberosForFiles $true. Assign RBAC roles — Storage File Data SMB Share Contributor for read/write. For on-premises AD DS: run AzFilesHybrid PowerShell module to domain-join the storage account. Assign RBAC roles and test access with a real user account before proceeding.

4

Portal or Terraform · 5 minutes

Create the file share with the correct quota and settings

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

5

Client machine · 5 minutes per client

Mount the share and verify access

Windows: New-PSDrive using the storage account FQDN as server path. Authentication via configured identity method — no credential prompt for Entra-joined devices. Linux: mount via CIFS with Kerberos security mode. macOS: SMB mount via Finder or open smb:// command. Verify read, write, and ACL behaviour with a real user account from each client OS in scope.

Step-by-step: 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

Azure Portal → All Services → Azure NetApp Files

Register the ANF resource provider and create the NetApp Account

Register Microsoft.NetApp as a resource provider in your subscription (Settings → Resource Providers → search Microsoft.NetApp → Register). Then create a NetApp Account in the target region. The NetApp Account is the top-level ANF container — name it meaningfully (e.g. corp-anf-uksouth). One NetApp Account per region is typically sufficient for most enterprise deployments.

2

Critical sizing decision · calculate before provisioning

Create the capacity pool — choose tier and size based on throughput requirement

Within the NetApp Account, create a capacity pool. Choose the tier (Standard/Premium/Ultra) based on your throughput requirement — not your capacity 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. Set the minimum at 4TiB. Enable manual QoS if you need to allocate throughput unevenly across volumes within the pool.

3

Networking · configure before volume creation

Delegate a subnet for ANF exclusive use

ANF requires a dedicated delegated subnet in your VNet — 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 file shares cannot be accessed directly from the internet — VPN or ExpressRoute is required for on-premises access.

4

Identity configuration for SMB volumes

Configure Active Directory connection for SMB or dual-protocol volumes

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 for an account with permission to join computers to the domain. ANF will create a computer object in AD for each SMB volume. This step is only required for SMB or dual-protocol volumes — NFS-only volumes use export policies without AD dependency.

5

Volume creation · one per workload or application

Create volumes within the capacity pool

Create individual volumes within the capacity pool. For each volume: set quota size (can be larger than pool size if capacity efficiency is expected from dedup/compression), select protocol (NFS/SMB/Dual), configure export policy for NFS (IP ranges, access rules), set snapshot policy if required. For dual-protocol volumes: select both SMB and NFS, configure NTFS-style security for Windows and Unix-style for Linux — ANF handles the permission mapping automatically.

6

Client configuration · mount target from volume overview

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: mount using the mount target IP and volume path (e.g. sudo mount -t nfs -o rw,hard,rsize=65536,wsize=65536,vers=4.1 <mount-ip>:/<volume-path> /mnt/anf). For SMB: map as a network drive using the SMB server name shown in the volume's SMB Mount Target. Validate latency and throughput against your expected workload profile before cutover.

ANF NFS volume 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 <anf-mount-ip>:/<volume-path> /hana/data nfs4 rw,hard,rsize=65536,wsize=65536,vers=4.1,tcp 0 0

# Verify mount and 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

✓ The honest summary

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

Azure NetApp Files is the correct choice for a specific, well-defined set of demanding workloads — SAP HANA, Oracle databases 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 — it is the only Azure-native file service that meets them. If your workload does not have those requirements, ANF's cost premium is not justified.