Error saving file path not authorised

[BonannoJade]

When trying to save my file, I get an automatic message saying that there was an error saving the file and that the
path was not authorised.
It wasn't the case before. What might be the problem and how can I resolve it?

[draw-io-triage-bot[bot]]

👋 Thank you for opening this issue!

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Summary: The user is unable to save their draw.io file due to an error stating the file path is not authorised, and is seeking help understanding why this started happening and how to resolve it.

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📝 Additional Information Needed

To help us investigate this more effectively, could you please provide:

• Environment / Platform: Which version of draw.io are you using? Is it the desktop app (Windows/Mac/Linux), the web version (app.diagrams.net), or an integration (Confluence, Google Drive, etc.)?
• Save location / storage: Where are you trying to save the file? (e.g., local filesystem, Google Drive, OneDrive, Confluence, GitHub, GitLab, etc.)
• File path: What is the full file path or location you are trying to save to? Does the path contain special characters, spaces, or is it on a network/cloud drive?
• Exact error message: Please provide the exact error message text or a screenshot of the error dialog.
• Steps to reproduce: What exact steps lead to this error? Does it happen every time, or intermittently? Does it happen with new files or only existing ones?
• Recent changes: You mention it wasn't the case before — did anything change recently? (e.g., OS update, draw.io update, changed file location, changed permissions, antivirus/security software update)
• Operating System: Which OS and version are you running? (e.g., Windows 11, macOS Sonoma, Ubuntu 24.04)

We also have some questions:

• Which platform of draw.io are you using — the desktop application, the web app at app.diagrams.net, or an integration like Confluence or Google Drive?
• Where exactly are you trying to save the file (local disk, network drive, cloud storage)?
• Could you share a screenshot of the exact error message you're seeing?
• If using the desktop app, have you tried saving to a different folder (e.g., your Desktop or Documents folder) to see if the error persists?
• Did anything change on your system recently — such as an OS update, antivirus software change, or a change in folder permissions?
• If you're on the desktop app, could you try launching it with administrator/elevated privileges to see if the issue is related to file system permissions?

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_{🤖 This is an automated response to help with initial triage. A human maintainer will review this issue. If you've provided all the requested information, no further action is needed - we'll get back to you soon!}

[xacinay84]

got the same error. detected on saving files to cloud storage, attached as a disk O. directories with traditional paths like disk C or D dont suffer that problem

[davidjgraph]

Both reports lack any details. The bot states the information we need, without that we can't help.

[xacinay84]

Environment / Platform: Windows 11, desktop application (privillages upgrade to sys administrator didnt help)
Save location / storage: local filesystem, disk O, Mail.ru Cloud
File path: o:\Concepts\SA.drawio
previously, editing files in this directory worked well, issue behaviour started since 0.30 ver approximately

Exact error message: Error saving file: path not authorised
Steps to reproduce: saving file after editing causes this error, reproducable (happens every time with all files)
Recent changes: major change was updating draw.io version to 0.30 other environment settings didnt change (at least, i dont know about it)
Operating System: Win 11
So Im forced to work with same files on disk C folder.

[xacinay84]

i can supply additional details via telegram @xacinay if needed. Wanna see fix delivered earlier :)

[lefox666]

Hi, facing the same issue after upgrading to 31.5.2 (from 28.?). I can't open or save drawio files from/to network mounted drives...

Environment / Platform: Which version of draw.io are you using? Is it the desktop app (Windows/Mac/Linux), the web version (app.diagrams.net), or an integration (Confluence, Google Drive, etc.)?
drawio desktop 31.5.2, Windows

Save location / storage: Where are you trying to save the file? (e.g., local filesystem, Google Drive, OneDrive, Confluence, GitHub, GitLab, etc.)
File path: What is the full file path or location you are trying to save to? Does the path contain special characters, spaces, or is it on a network/cloud drive?
Open or save from/to NTFS network mounted drives (not cloud)

Exact error message: Please provide the exact error message text or a screenshot of the error dialog.
Popup window:
Title: Error
Text: path not authorised

Steps to reproduce: What exact steps lead to this error? Does it happen every time, or intermittently? Does it happen with new files or only existing ones?
Systematic.
Navigate to a drawio file on the NTFS mounted drive and try to open it.
If I copy the file to my local C: drive, I can open the file fine.

Recent changes: You mention it wasn't the case before — did anything change recently? (e.g., OS update, draw.io update, changed file location, changed permissions, antivirus/security software update)
Upgraded from drawio 28.x to 31.5.2. It was working fine with v28

Operating System: Which OS and version are you running? (e.g., Windows 11, macOS Sonoma, Ubuntu 24.04)
MS Windows 11

We also have some questions:
Which platform of draw.io are you using — the desktop application, the web app at app.diagrams.net, or an integration like Confluence or Google Drive?
desktop

Where exactly are you trying to save the file (local disk, network drive, cloud storage)?
NTFS mount network drive

Could you share a screenshot of the exact error message you're seeing?
No, but I described it above

If using the desktop app, have you tried saving to a different folder (e.g., your Desktop or Documents folder) to see if the error persists?
It works fine when saving/opening from local C: drive. I tried from 2 different NTFS and it systematically fails.

Did anything change on your system recently — such as an OS update, antivirus software change, or a change in folder permissions?
If you're on the desktop app, could you try launching it with administrator/elevated privileges to see if the issue is related to file system permissions?
It stopped working solely following the upgrade of drawio application.

[davidjgraph]

can you try 31.5.3 please?