What Happens to Your Files If Your Internet Goes Down?
An internet outage should not mean a work stoppage. Here is exactly what happens to your file sharing setup when the internet goes out, and how to make your office resilient.
It depends entirely on where your files live. Files on a local NAS or shared folder stay fully accessible — the internet is irrelevant to LAN access. Dropbox, OneDrive and Google Drive keep locally-synced copies readable but stop syncing and block anything not already downloaded. LAN transfer tools keep working normally. The resilient setup keeps working files reachable on the local network so an outage is an inconvenience, not a work stoppage.
The Short Answer
If your files are on a local network — a shared folder on a colleague's machine, a NAS, or any on-premise storage — an internet outage has zero effect on your ability to access them. Local network file sharing does not use the internet.
If your files are in cloud storage — Dropbox, Google Drive, OneDrive, SharePoint — an internet outage cuts off access to any files not already downloaded and cached locally.
The rest of this article unpacks what this means for each tool your office may be using.
Scenario 1 — Files on a Local NAS or Shared Folder
When internet goes down: Nothing changes. Your office LAN (Local Area Network) continues to operate. The NAS, shared folders, and all machines connected to the same router or switch can still communicate with each other at full local network speed.
Your team can continue:
- Accessing shared project folders
- Transferring files between machines
- Printing to networked printers
- Using any software that reads from a local network path
What stops working: Email, cloud services, web browsing, video conferencing, and any software that requires a connection to a remote server (SaaS applications, cloud accounting, etc.).
Local file access is completely unaffected.
Scenario 2 — Files in Dropbox
Files that have been synced to your local drive: Accessible. When Dropbox syncs a file, it writes a copy to your local machine at C:\Users\YourName\Dropbox\.... This local copy is readable even without internet.
Files that exist in Dropbox but have not been made available offline: Not accessible in Dropbox's default "online-only" mode. Dropbox shows the file icon but clicking it requires downloading from Dropbox servers — which fails without internet.
File changes made during the outage: Saved to the local Dropbox folder. When the internet reconnects, they sync automatically.
Team collaboration during outage: If two people edit the same Dropbox file offline simultaneously, a sync conflict will occur when internet reconnects. Dropbox creates a conflict copy — both versions survive, but someone needs to manually resolve the conflict.
Scenario 3 — Files in OneDrive
Same behaviour as Dropbox. Files explicitly marked "Always keep on this device" are accessible offline. Files in online-only mode are not accessible during an outage.
OneDrive's "Always available offline" setting is per-file or per-folder: right-click the file/folder in File Explorer → OneDrive → Always keep on this device.
SharePoint (online): Not accessible during an outage. SharePoint Online is a web service — it requires internet access entirely.
Scenario 4 — Files in Google Drive
Google Drive's desktop sync client (Drive for Desktop) maintains local copies of files you have specifically made available offline. Google Docs, Sheets, and Slides can be edited offline and sync when reconnected. Large binary files (videos, PSDs, DWGs) are not available offline unless explicitly downloaded.
During an outage: Google Workspace web apps (Docs, Sheets) become unavailable. Files physically downloaded to your machine remain accessible. The Google Drive sync folder shows the last synced state but cannot update.
Scenario 5 — LAN Transfer Tools
Application-level LAN transfer tools like Oxolan and LocalSend operate entirely on the local network. An internet outage has no effect on their operation.
- Both machines are on the same local network → File transfer works normally
- No cloud routing → No internet required
- No authentication server → The application does not check in with a server
How to Make Your Office Resilient to Internet Outages
For file access during outages:
-
Keep a local copy of active project files. Encourage staff to save working files to the local machine and sync to cloud when complete, rather than working exclusively from cloud-synced folders.
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Use local network sharing for files shared between colleagues. Files on a local NAS or shared folder are accessible regardless of internet status.
-
Mark frequently needed cloud files as "Always available offline." In Dropbox and OneDrive, this ensures a local copy exists on the machine that needs it.
For internet-dependent workflows:
-
Identify which workflows stop completely without internet and plan for them:
- Cloud accounting (Xero, QuickBooks Online): requires internet
- Cloud project management (Asana, Monday, Jira): requires internet
- Video calls (Teams, Zoom, Meet): require internet
- Email: requires internet
-
Consider mobile data as a failover. A team of 5 people can share one smartphone's hotspot for essential internet tasks (email, bank access) during a short outage. For sustained outages, a 4G/5G router with a data SIM provides better coverage.
The Ideal Outage-Resilient Office Architecture
| File type | Storage location | Outage impact |
|---|---|---|
| Active project files | Local NAS + local machine copies | None |
| Reference files and templates | Local NAS | None |
| Client deliverables being prepared | Local machine | None |
| Cloud backup copies | Cloud (Backblaze, S3) | Cannot update during outage; fine |
| Files for remote access by clients | Cloud (Dropbox, Google Drive) | No access during outage |
| SaaS applications | Cloud | Unavailable during outage |
Frequently asked questions
Can I access my files if the internet goes down?
Files on a local NAS or shared folder: yes, fully — LAN access does not use the internet. Cloud services (Dropbox, OneDrive, Google Drive): only the copies already synced to your device, and syncing stops until the connection returns. Anything cloud-only that you have not downloaded is unreachable during the outage.
Does local file sharing work without internet?
Yes. Local network sharing — shared folders, NAS, and LAN transfer apps like Oxolan — runs entirely on your own network hardware and does not touch the internet, so an ISP outage has no effect on moving files between office machines. Only internet-dependent services are affected.
How do I make my office resilient to internet outages?
Keep the files people work on daily reachable on the local network — a NAS, a shared folder, or LAN transfer between machines — rather than exclusively in the cloud. Then an outage stops your email and web, but staff can still open, edit and pass files around normally. Keep an off-site backup too, separate from the live copy.
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