Best File Sharing App for Architects and Engineers — No Cloud Required

Why Architecture and Engineering Firms Have a Unique File Sharing Problem

The file sharing challenges faced by architecture and engineering offices are distinct from general small business needs in three specific ways.

File size. A single Revit model can exceed 500MB. A rendered exterior perspective image in full resolution runs 50–150MB. A complete set of construction documents for a medium project often exceeds several gigabytes. These are not document sizes that fit comfortably into cloud workflow speeds, particularly on typical office broadband connections.

Client confidentiality. Architectural and engineering projects frequently involve site-specific information, client addresses, proprietary building layouts, and commercially sensitive development plans. Storing these on third-party cloud infrastructure is a risk that some clients and client agreements explicitly prohibit.

Software interoperability. BIM tools (Revit, ArchiCAD, Tekla), CAD software (AutoCAD, BricsCAD), and rendering applications expect files to be accessed from local paths at local storage speeds. A file on a slow cloud sync may cause application performance problems or file locking conflicts when opened simultaneously.

Why Cloud Storage Underperforms for These Workflows

Cloud synchronisation services — Dropbox, OneDrive, Google Drive — are excellent for the use cases they were designed for: small-to-medium document collaboration, remote access, and sharing with external parties.

For architecture and engineering workflows, the limitations are structural:

• A 2GB Revit model uploaded at 50 Mbps takes approximately 6 minutes to become available to a colleague. On a local network, the same file arrives in under 30 seconds.
• Depending on sync status, a colleague may open a model file before the latest version has finished uploading, causing version conflicts.
• Cloud sync adds a local copy of every project file on every machine, multiplying storage requirements.
• Opening large files through a cloud-synced folder can be significantly slower than from a local or LAN path.

Option 1 — Local Network File Sharing (Recommended for In-Office Teams)

For studios where the team works in the same office, local network file sharing is the most effective solution to the file size problem.

Files move at network speed: 90–115 MB/s on wired gigabit ethernet. A 2GB model takes approximately 18 seconds. There is no internet bandwidth consumed, no upload queue to wait for, and no concern about client files leaving your physical premises.

Windows built-in SMB: Technically capable but requires configuration and maintenance. Appropriate for firms with IT support.

Dedicated LAN transfer tools: Oxolan handles the network sharing layer without requiring Windows networking configuration. Install on each machine, select a colleague, transfer a folder. Practice-specific files stay on the local network.

Get Oxolan for Windows

Option 2 — Network Attached Storage (NAS)

A NAS is the appropriate infrastructure solution for firms where files need to be accessed centrally rather than transferred between individuals.

For an architecture firm with 5–15 staff, a Synology or QNAP NAS sits on the office network and presents a shared drive to all machines. Project folders are organised centrally, permissions are managed from one interface, and there is a clear single source of truth for each project's current files.

Practical considerations:

• Entry-level NAS setup: $400–$800 (device + drives)
• Configuration takes several hours initially
• Requires one staff member to manage occasionally
• With optional remote access modules, staff can reach files from home without cloud sync

A NAS is the most common solution at architecture firms between 10 and 50 staff.

Option 3 — Self-Hosted Collaboration Platforms

Some practices use self-hosted platforms (Nextcloud, Pydio) that provide a Dropbox-like experience running on company-owned hardware. This combines cloud-like access (web browser, mobile, sharing links) with data residency on your own server.

The trade-off is setup and hosting complexity — a self-hosted platform requires a server, IT capacity to configure it, and ongoing maintenance.

Option 4 — Secure Physical Handoff for Particularly Sensitive Projects

For project-specific files where the risk justification for any network transfer is too high, a USB drive from a trusted source remains appropriate. This is uncommon but not unknown in projects involving sensitive government facilities, high-security private clients, or under NDA with explicit prohibitions on network storage.

What Leading Small Architecture Firms Actually Use

Based on the common pattern across small architecture offices:

• 2–5 person practice: Usually a shared folder on one machine via SMB, or a LAN transfer tool, supplemented by Dropbox or WeTransfer for client delivery.
• 5–15 person studio: A NAS with a centralised project folder structure, often with a VPN for remote access.
• 15–50 person firm: Often have a Windows Server, Active Directory, and managed network infrastructure.

The Key Question to Ask

Before evaluating tools, answer: do your team members primarily access files from a central location, or send files between individual workstations?

If access from a central location: a NAS or file server is the correct answer. If sending between workstations: a LAN transfer tool is more appropriate.

Many practices need both.

Frequently Asked Questions

Can Revit files be opened directly over a LAN share? Yes, with some caveats. Revit supports worksharing over a network path, but performance is best when files are on a fast wired connection. Opening Revit models over WiFi can be slower than from a local drive. For active worksharing, a dedicated Revit server or Autodesk BIM 360/Revit Cloud Worksharing is the recommended infrastructure.

Is it safe to share project files over the office WiFi? Files on your local WiFi are accessible only to devices connected to that network. Ensure your office WiFi is password-protected and that you know which devices are connected. For highly sensitive projects, wired connections are preferable.

How do we share files with structural engineers or consultants who are off-site? Local network tools do not extend beyond the office. For external file delivery, options include: a shared cloud folder (Dropbox, WeTransfer), a secure file portal on your website, or physical media for particularly sensitive documents. A NAS with remote access capabilities can also allow authorised external access.

What about BIM 360 or Autodesk Construction Cloud? Autodesk's cloud platforms are designed specifically for worksharing and collaboration on Autodesk projects. They are well-suited for larger firms or projects where multiple parties need simultaneous model access. The cost and complexity may be disproportionate for a small practice using Revit for individual projects without external collaboration requirements.