[BUG] sandbox error.

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Hello,

I am a Pro plan subscriber and am unable to use Cowork reliably due to a recurring sandbox error. I would like to report this as a billing-relevant bug.

ISSUE
Every Cowork session fails with the error: "Attempted to list directory contents; disk space exhausted"

This happens immediately after the folder mounts. Cowork confirms it has accessed the folder, then immediately reports disk space exhaustion before listing a single file.

ENVIRONMENT

• Plan: Claude Pro
• Platform: macOS
• Claude Desktop: latest version (redownloaded from claude.ai/download)
• Folder location: Desktop (home directory)
• Folder size: under 50 files, mixed documents (Word, PDF, Excel) and images
• Folder name: plain English, no special characters
• Selection method: 'Work in a Folder' checkbox

TROUBLESHOOTING ALREADY COMPLETED

• Full Disk Access granted to Claude Desktop in macOS System Settings
• Multiple fresh sessions attempted (10+)
• Clean reinstall of Claude Desktop performed
• Tested with a small dedicated test folder
• macOS restarted

None of the above resolved the issue.

REQUEST
Please investigate this as a platform-side sandbox infrastructure issue. As this is a core advertised feature of the Pro plan that is entirely non-functional for me, I would also appreciate confirmation of whether a credit or plan adjustment is available while the issue remains unresolved.

Thank you.

What Should Happen?

Subject: Cowork Bug Report: Sandbox Disk Space Exhausted on Every Session — Pro Plan

Hello,

I am a Pro plan subscriber and am unable to use Cowork reliably due to a recurring sandbox error. I would like to report this as a billing-relevant bug.

ISSUE
Every Cowork session fails with the error: "Attempted to list directory contents; disk space exhausted"

This happens immediately after the folder mounts. Cowork confirms it has accessed the folder, then immediately reports disk space exhaustion before listing a single file.

ENVIRONMENT

• Plan: Claude Pro
• Platform: macOS
• Claude Desktop: latest version (redownloaded from claude.ai/download)
• Folder location: Desktop (home directory)
• Folder size: under 50 files, mixed documents (Word, PDF, Excel) and images
• Folder name: plain English, no special characters
• Selection method: 'Work in a Folder' checkbox

TROUBLESHOOTING ALREADY COMPLETED

• Full Disk Access granted to Claude Desktop in macOS System Settings
• Multiple fresh sessions attempted (10+)
• Clean reinstall of Claude Desktop performed
• Tested with a small dedicated test folder
• macOS restarted

None of the above resolved the issue.

REQUEST
Please investigate this as a platform-side sandbox infrastructure issue. As this is a core advertised feature of the Pro plan that is entirely non-functional for me, I would also appreciate confirmation of whether a credit or plan adjustment is available while the issue remains unresolved.

Thank you.

Error Messages/Logs

It looks like the folder you've selected (Cowork-Test) is currently empty — there are no files in it yet.
A couple of things to check:

Did you select the right folder? The folder I have access to appears to be empty. You may have selected a different folder than intended.
Want to select a different folder? I can request access to another folder on your computer where your files actually live.

Would you like me to open a folder picker so you can point me to the right location?

Steps to Reproduce

Subject: Cowork Bug Report: Sandbox Disk Space Exhausted on Every Session — Pro Plan

Hello,

I am a Pro plan subscriber and am unable to use Cowork reliably due to a recurring sandbox error. I would like to report this as a billing-relevant bug.

ISSUE
Every Cowork session fails with the error: "Attempted to list directory contents; disk space exhausted"

This happens immediately after the folder mounts. Cowork confirms it has accessed the folder, then immediately reports disk space exhaustion before listing a single file.

ENVIRONMENT

• Plan: Claude Pro
• Platform: macOS
• Claude Desktop: latest version (redownloaded from claude.ai/download)
• Folder location: Desktop (home directory)
• Folder size: under 50 files, mixed documents (Word, PDF, Excel) and images
• Folder name: plain English, no special characters
• Selection method: 'Work in a Folder' checkbox

TROUBLESHOOTING ALREADY COMPLETED

• Full Disk Access granted to Claude Desktop in macOS System Settings
• Multiple fresh sessions attempted (10+)
• Clean reinstall of Claude Desktop performed
• Tested with a small dedicated test folder
• macOS restarted

None of the above resolved the issue.

REQUEST
Please investigate this as a platform-side sandbox infrastructure issue. As this is a core advertised feature of the Pro plan that is entirely non-functional for me, I would also appreciate confirmation of whether a credit or plan adjustment is available while the issue remains unresolved.

Thank you.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Version 1.1.5368 (d12d02)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_