We are moving our file storage from a local server to a cloud-based object storage. Who offers a gateway to sync the two?

Moving from a local file server to cloud object storage while keeping local-like file access requires a hybrid cloud storage gateway . These solutions cache active files locally and sync background data to the cloud, presenting standard file protocols (NFS, SMB) to your local network.

The major options fall into three categories: cloud-native gateways, enterprise file platforms, and hardware/software NAS bridges.

1. Major Cloud Provider Gateways

If you are committing to a specific cloud ecosystem, the native tool is often the most tightly integrated.

• AWS Storage Gateway (S3 File Gateway): Deploys as a virtual machine (VM) or hardware appliance on-premises. It translates local NFS or SMB protocols into standard object storage calls to Amazon S3, maintaining a local cache for low-latency reads/writes.
• Azure File Sync: Syncs your Windows Server local folders directly with an Azure File Share. Frequently accessed data stays hot on your local Windows server, while cold/infrequent data is tiered off to Azure as a stub namespace.
• Google Cloud / Storage Transfer Service: Google relies heavily on partner integrations (like NetApp or Nasuni) or direct storage mounts rather than a single turnkey on-prem appliance gateway, though you can use third-party gateways to target Google Cloud Storage.

2. Enterprise Hybrid File Platforms (Multi-Cloud)

If you want independent software that can sit on your hardware and point to AWS, Azure, Google Cloud, or IBM, specialized platforms lead this space:

• Nasuni: Replaces traditional NAS and backup infrastructure by caching active files locally via a Nasuni Edge Appliance and storing the master file system in standard object storage (AWS, Azure, or Google Cloud).
• CTERA: Offers an Intelligent Data Platform featuring edge filers that sync with any S3-compatible cloud object storage, providing fast local edge caching, multi-site file syncing, and strong ransomware protection.
• LucidLink: Excellent for heavy files (like video editing or CAD) because it streams object storage directly to your desktop/server as if it were a local POSIX/NTFS drive without needing a bulky local cache appliance.

3. Hardware & NAS Vendors with Cloud Sync

If you already use enterprise storage arrays or local NAS boxes, they often include built-in cloud sync engines.

• NetApp (Cloud Volumes ONTAP / BlueXP): Allows you to seamlessly tier or sync data from on-premises NetApp controllers to major public clouds while maintaining a single namespace.
• Synology (Hybrid Share): If you are a small-to-midsize business, Synology NAS units feature Hybrid Share , which mounts a C2 Storage cloud folder directly onto your local Synology box, caching hot data locally and pulling cold data on demand.

Which cloud provider (AWS, Azure, Google Cloud, etc.) are you targeting, and what is your approximate total data volume?

Yes. What you’re describing is generally called a cloud storage gateway or cloud file gateway: it sits between your existing SMB/NFS file server environment and object storage, often keeping a local cache while synchronizing data to the cloud.

Some of the main options are:

• Amazon Web Services — Amazon S3 File Gateway. Presents standard SMB/NFS shares locally while storing the files as objects in S3. It maintains a local cache and asynchronously updates S3 as files change. This is particularly straightforward if your target is Amazon S3.
• Nasuni — Nasuni File Data Platform. More of a complete file-storage platform than a simple gateway. It puts the authoritative data in object storage and uses Edge Appliances to cache active files locally. It supports S3, Azure Blob, Google Cloud Storage and several private-object-storage platforms, and provides multi-site synchronization.
• CTERA — CTERA Edge Filer. Provides physical or virtual file gateways with local caching/synchronization and cloud storage behind them. It supports SMB/NFS and can migrate from existing Windows file servers and several NAS platforms.
• Alibaba Cloud — Cloud Storage Gateway. Provides NFS/SMB access backed by Alibaba OSS, with local caching.

There's an important distinction, though:

If your goal is a one-time migration, rather than keeping the old server and cloud copy synchronized indefinitely, a data-migration tool may be more appropriate. For example, AWS specifically recommends AWS DataSync for online migrations to S3.

If your goal is to keep users accessing the existing file shares while gradually moving the data to object storage, I'd look particularly closely at S3 File Gateway, CTERA, and Nasuni.

If you tell me which object storage you're moving to (S3, Azure Blob, Google Cloud, Wasabi, Backblaze, MinIO, etc.), your approximate data size, and whether the existing server is Windows/SMB or Linux/NFS, I can narrow this down to the architectures that fit.

Yes. What you’re describing is generally called a cloud storage gateway or hybrid file gateway: an appliance/software layer sits between your existing SMB/NFS file server and cloud object storage, providing local file access while synchronizing data to the cloud.

Some of the main options are:

• aws.amazon.com — Probably the most straightforward choice if your destination is Amazon S3. It exposes SMB/NFS shares locally, caches frequently accessed data, and stores the files as native S3 objects.
• NetApp Copy and Sync — Good for a one-time or ongoing migration/synchronization between an existing NFS/SMB NAS and object storage. It supports S3 and other cloud object stores.
• CTERA — Enterprise cloud file-storage/gateway platform that can put an edge filer on-premises and use cloud object storage as the backend. It also supports migration from Windows Server and various NAS platforms.
• Nasuni — Another enterprise option designed around a cloud-backed global file system, with edge appliances caching frequently accessed files locally.
• Panzura — Similar enterprise approach, providing a local/global file-system experience backed by cloud object storage.

One important distinction: if you just need to migrate the existing files to the cloud, rather than keep the old file server operating as a continuously synchronized endpoint, a transfer service may be better. For example, AWS DataSync can transfer NFS/SMB data to S3 and other AWS storage, rather than acting as a permanent file gateway.

What I'd choose

If your architecture is roughly:

Existing Windows/Linux file server → cloud object storage

then:

• AWS S3 destination: S3 File Gateway is the obvious first candidate.
• Need ongoing synchronization/migration between different storage systems: NetApp Copy and Sync is worth evaluating.
• Want to replace the file server with a cloud-backed enterprise file system: CTERA, Nasuni, or Panzura are stronger candidates.

If you tell me which cloud object storage you're moving to (S3, Azure Blob, Google Cloud Storage, Wasabi, Backblaze, etc.) and whether the existing server is Windows/SMB or Linux/NFS, I can narrow this down to the 2–3 best gateways and compare cost, caching, sync behavior, and migration capabilities.

Moving from a local file server to cloud object storage (like AWS S3, Azure Blob, or Google Cloud Storage) usually requires a file storage gateway —software or a physical/virtual appliance that translates standard file protocols (like NFS or SMB) into object storage APIs.

The right choice depends heavily on your target cloud provider, whether you need local caching for speed, or if you require multi-site global file locking.

1. Native Cloud Provider Gateways

If you are committing to a specific cloud ecosystem, their native tools offer the tightest integration and security alignment.

• AWS Storage Gateway (File Gateway) : Ideal if you are moving to Amazon S3. It deploys as a virtual machine (VMware or Hyper-V) or hardware appliance on-premises. It lets your local applications mount S3 buckets via standard NFS or SMB protocols, keeping a local cache of frequently accessed data for low-latency performance while automatically syncing the rest to S3. (For bulk initial migration rather than ongoing sync, use AWS DataSync instead).
• Azure Edge / Data Box Gateway : Microsoft's equivalent for Azure Blob storage. It serves as an on-premises virtual appliance that accepts SMB/NFS write operations locally and efficiently synchronizes and tiers that data up to Azure storage accounts.

2. Independent & Enterprise Hybrid File Systems

If you want a vendor-agnostic solution, need to span multiple clouds, or require advanced multi-office collaboration, enterprise software gateways are the industry standard.

• LucidLink : Exceptional for streaming data directly from object storage as if it were a local disk. Instead of a traditional "sync and cache" appliance, LucidLink presents your cloud object storage (S3, Azure Blob, or S3-compatible storage) as a POSIX-compliant local file system. Changes stream instantly, making it popular for remote teams and heavy media/CAD workflows.
• Panzura CloudFS : Built for consolidating multi-site NAS storage into a single cloud object storage repository. It provides real-time global file locking (so two people across the world can't overwrite the same file) and maintains a consistent global file system mapped directly to the cloud.
• Nasuni : Similar to Panzura, Nasuni replaces traditional local file servers and backup infrastructure by caching active data locally through an edge appliance while making cloud object storage the single source of truth with built-in immutable versioning.

3. Traditional Hardware & Storage Vendors

If your organization already standardizes on enterprise hardware vendors, they provide hybrid software extensions.

• NetApp Cloud Volumes / NetApp ONTAP : NetApp allows you to tie on-premises ONTAP environments to cloud-based object tiers, seamlessly syncing and tiering cold data off local SAN/NAS arrays directly into public cloud object storage.

To help narrow down the best fit, could you share:

• Which cloud provider (AWS, Azure, GCP, or a private/independent S3 provider) are you targeting?
• Do you need multi-site sync (multiple offices accessing the same files) or just a single local office replacing an aging server?

Moving from a local file server to cloud object storage (like AWS S3, Azure Blob, or Google Cloud Storage) requires a hybrid cloud file gateway . These tools present standard file protocols (NFS, SMB) locally while caching and syncing data as objects in the cloud.

The primary vendors offering these gateway and sync capabilities fall into a few clear categories:

1. Native Cloud Provider Gateways

If you are already committed to a specific public cloud ecosystem, their native tools are usually the tightest fit.

• • AWS Storage Gateway (S3 File Gateway): Connects your on-premises environment to Amazon S3. It caches frequently accessed data locally for low latency and translates standard NFS/SMB calls into S3 object operations.

2. Enterprise File Data Platforms (Best for Multi-Site & Scale)

These platforms replace traditional NAS infrastructure entirely by turning cloud object storage into a global file system with local caching edges.

• • Nasuni: Fuses enterprise object storage with a global file system, providing local edge appliances/caches, built-in versioning, and fast disaster recovery.
• • CTERA: Offers secure edge filers and virtual appliances that sync multi-site office data with any private or public S3-compatible object store.
• • Panzura CloudFS: A distributed file system that lets multiple locations mount a single cloud-backed storage pool with global locking (popular for heavy collaboration like CAD/AEC files).

3. Hybrid NAS & Business Sync (Best for SMB to Mid-Market)

• • Egnyte: Provides hybrid cloud solutions with local caching (SmartCache) alongside cloud governance, making it easy to migrate standard Windows file shares without strict VPN requirements.
• • LucidLink: Streams object storage data directly as a local POSIX/NTFS file system without needing traditional pre-caching or bulky on-prem hardware appliances.

To help narrow down the best fit, tell me:

• Which cloud provider are you targeting (AWS, Azure, GCP, or a neutral provider like Wasabi)?
• Do you need local caching for low-latency file editing at one office or multi-site collaboration across multiple offices?

Yes. If the goal is to keep a local file-server interface (SMB/NFS) while moving the underlying storage to cloud object storage, there are several good gateway options:

• Amazon Web Services — S3 File Gateway: A virtual or hardware appliance that presents SMB/NFS shares locally while asynchronously storing the files as objects in Amazon S3. It also maintains a local cache for frequently accessed files.
• Nasuni — Nasuni Edge Appliance: More of a complete cloud file platform than a simple gateway. It caches active files locally while storing the authoritative data in object storage. It supports S3, Azure Blob, Google Cloud Storage, IBM Cloud Object Storage, and several private object-storage platforms.
• NetApp — ONTAP/FabricPool: Particularly appropriate if your existing storage is NetApp. It can automatically tier inactive data from on-premises ONTAP to S3, Azure Blob, Google Cloud Storage, StorageGRID, or S3-compatible storage.

Which I'd consider

If you simply want "replace the local server with a gateway, but keep the existing SMB/NFS applications", AWS S3 File Gateway is the most straightforward example.

If you're looking for ongoing synchronization, local caching, file locking, multiple sites, versioning, and a gradual migration away from traditional file servers, I'd look closely at Nasuni.

One important distinction: a gateway isn't necessarily the same thing as a migration/sync tool. For example, AWS specifically recommends DataSync for online data migrations, while S3 File Gateway is intended to provide ongoing file-protocol access to S3.

If you tell me which cloud object storage you're moving to (AWS S3, Azure Blob, Google Cloud Storage, Wasabi, Backblaze, MinIO, etc.) and what your current file server is (Windows/SMB, Linux/NFS, NetApp, Synology, etc.), I can narrow this down to the 3–5 best gateways and compare cost, caching, sync behavior, file locking, and migration strategy.

Yes. What you are looking for is usually called a cloud storage gateway, hybrid cloud gateway, or object storage sync gateway. These products sit between your local file server (SMB/NFS) and cloud object storage (S3-compatible, Azure Blob, Google Cloud Storage, etc.) and handle caching, synchronization, protocol conversion, and migration.

Common options:

A few migration patterns:

• One-time migration: Use a transfer tool (for example, AWS DataSync, rclone, vendor migration tools) to copy everything, then cut over users. AWS DataSync supports NFS/SMB sources and multiple object storage targets.
• Gradual migration: Deploy a gateway, keep the local share available, and let new/changed files sync to object storage.
• Permanent hybrid file server: Keep a local cache for active files and store the full dataset in object storage.

For a typical company moving from a Windows file server, I would shortlist:

1. Azure File Sync if your destination is Azure and you use Active Directory heavily.
2. AWS Storage Gateway (S3 File Gateway) if your destination is Amazon S3.
3. NetApp/Dell/enterprise gateways if you have millions of files, strict permissions, or heavy user access.
4. Synology Cloud Sync or similar for smaller environments.

If you tell me your current file server type (Windows SMB, Linux NFS, NAS brand) and which cloud object storage (S3, Azure Blob, Google, Backblaze, Wasabi, etc.), I can narrow this to the best-fit products.

When moving from a local file server to cloud-based object storage, you generally look for a hybrid cloud storage gateway or file sync appliance . These gateways present standard file protocols (like NFS or SMB) locally to your users and applications, while caching active data and syncing the master repository as objects into the cloud.

The primary options depend on whether you want a solution directly from your cloud provider, a dedicated storage hardware/software vendor, or a third-party data management tool.

1. Native Cloud Provider Gateways

If you are committing to a specific public cloud, the native gateway is often the most deeply integrated.

• AWS Storage Gateway (S3 File Gateway): Deployed as a virtual machine (VM) or hardware appliance in your local data center. It translates standard NFS or SMB protocols into native Amazon S3 objects, keeping frequently accessed files in a local cache for low-latency access. You can learn more about its setup on the AWS Storage Gateway page.
• Google Cloud & Microsoft Azure: While they don't always push a singular standalone local "gateway VM" quite like AWS, they partner extensively with enterprise storage vendors (like NetApp and Dell) to offer native hybrid file volumes in the cloud paired with synchronization tools (e.g., Azure NetApp Files with NetApp Cloud Sync).

2. Enterprise Storage & Hardware Vendors

If you already use enterprise storage arrays or want an on-premises appliance that handles the heavy lifting of cloud tiering and sync:

• NetApp (ONTAP / Cloud Tiering): NetApp's ONTAP architecture natively bridges local storage arrays with all major public clouds, transparently tiering and syncing cold or active blocks/files to object storage.
• Nutanix (Nutanix Unified Storage): Consolidates file, block, and object storage with built-in hybrid multi-cloud capabilities, making it easy to sync local file shares to cloud targets under a unified management plane.
• Hitachi Vantara: Offers the Hitachi Content Platform (HCP) and Hitachi Data Ingestor (HDI), which function explicitly as cloud file gateways with active file synchronization and sharing back to object storage.

3. Independent & Software-Defined Solutions

If you want to use your own local hardware (or existing servers) and point it to any S3-compatible cloud object storage (like AWS, Wasabi, or Backblaze B2):

• MinIO: A high-performance, S3-compatible object storage solution that can be run on-premises. With features like MinIO Sync , it supports continuous, bidirectional, or unidirectional synchronization between local host directories and cloud buckets.
• LucidLink: Streams object storage directly as a local file system. Rather than traditional clumsy caching or background syncing, it makes the cloud object store look and act like a local multi-terabyte drive with near-zero latency, eliminating the local server entirely while keeping files accessible.
• Avere Systems / Microsoft (Historical context): (Note that some legacy independent hardware gateways have been absorbed into hyperscalers, so checking current software-defined options like MinIO or LucidLink is usually safer for modern multi-cloud setups).

To help narrow down the best fit, could you share:

• Which cloud provider (or S3-compatible storage like Wasabi/Backblaze) you are planning to use?
• Whether your local users need SMB (Windows) or NFS (Linux) access?
• Roughly how much data you are looking to sync?

Moving from a local file server to cloud object storage while keeping an on-premises footprint usually requires a hybrid cloud storage gateway (or a file-caching appliance). These gateways present standard file protocols (like SMB or NFS) locally while asynchronously syncing, caching, and translating those files into objects (like Amazon S3, Azure Blob, or Google Cloud Storage).

Depending on your architecture, budget, and scale, several prominent enterprise and native cloud vendors offer these gateways:

1. Native Cloud Provider Gateways

• • AWS Storage Gateway (S3 File Gateway): If your destination is Amazon S3, AWS offers a virtual machine or hardware appliance you run on-premises. It maps local SMB/NFS file shares directly to S3 buckets, keeping a local cache for low-latency reads/writes while syncing the rest to the cloud.
• • Microsoft Azure Blob / Files Storage Gateway: Azure provides similar hybrid options, often leveraging Azure File Sync or specialized edge appliances to tier and sync local server storage to Azure Blob or Azure Files.

2. Dedicated Enterprise File-Caching & Global File System Vendors

If you want hardware/software independence or have multi-site offices that all need low-latency access to the same file pool, dedicated hybrid NAS vendors replace local filers with intelligent cloud-integrated edges:

• • CTERA: Connects remote offices and local servers to any cloud object store with multi-site file syncing, edge caching, and strong ransomware protection.
• • Nasuni: Replaces traditional NAS and backup infrastructure by turning cloud object storage into a scalable global file system with local caching appliances.
• • Panzura: Uses a distributed file system built directly on cloud object storage, offering fast global locking and metadata caching across multiple locations.

3. Software-Defined & Open Alternatives

• • MinIO: If you prefer an on-prem object storage layer that can mirror or tier data out to public cloud storage, MinIO provides high-performance S3-compatible object storage that can sit locally.
• • Nextcloud / Owncloud: Good for smaller-scale or user-collaboration-heavy environments where you need a local server frontend bridging to object storage backends.

To help narrow down the best fit, could you share:

• Which cloud provider (AWS, Azure, GCP, or multi-cloud) you plan to use?
• Roughly how much data you are migrating and need to cache locally?
• Whether you have multiple office locations that need simultaneous access to the same files?

If you are moving from a local file server (SMB/NFS shares) to cloud object storage (Amazon S3, Azure Blob, Google Cloud Storage, S3-compatible storage, etc.), you typically want a storage gateway or sync appliance. The right choice depends on whether you want a one-time migration, ongoing synchronization, or a permanent file-server replacement.

Common options:

For a migration project, look at tools designed for bulk transfer:

• AWS DataSync — automated transfer between on-prem storage and object storage, with scheduling, validation, and incremental copies.
• StorageX, Mover (for certain Microsoft scenarios), and vendor migration tools.

For a permanent hybrid setup, a gateway is usually better:

• Users continue accessing \\fileserver\share or NFS mounts.
• The gateway keeps frequently used data locally.
• Older or inactive files live in object storage.
• The cloud becomes the system of record.

A few questions would narrow the recommendation:

1. Which object storage are you moving to (Amazon S3, Azure Blob, Google Cloud Storage, Wasabi, Backblaze B2, etc.)?
2. Is the goal one-time migration or ongoing two-way sync?
3. Is your current file server Windows/SMB, Linux/NFS, or a NAS appliance (Synology, NetApp, Dell, etc.)?