claude-code - 💡(How to fix) Fix [FEATURE] Allow configuring VM bundle (vhdx) storage location [1 participants]

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anthropics/claude-code#56089Fetched 2026-05-05 05:58:31
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Fix Action

Fix / Workaround

The bundle is already ~12 GB after initial setup, and sessiondata.vhdx grows over time as the VM accumulates state. On systems where C: is with limited capacity, this footprint is significant and unavoidable — there is currently no way to relocate it to a secondary drive. NTFS junctions (mklink /J) fail. There is no reliable user-side workaround.

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Preflight Checklist

  • I have searched existing requests and this feature hasn't been requested yet
  • This is a single feature request (not multiple features)

Problem Statement

Claude Cowork's VM bundle (rootfs.vhdx, sessiondata.vhdx, etc.) is stored in a hardcoded location under %LocalAppData%\...\claudevm.bundle\

The bundle is already ~12 GB after initial setup, and sessiondata.vhdx grows over time as the VM accumulates state. On systems where C: is with limited capacity, this footprint is significant and unavoidable — there is currently no way to relocate it to a secondary drive. NTFS junctions (mklink /J) fail. There is no reliable user-side workaround.

For me, it's quite unconvenient. I have to move other files to D: to continue use Cowork.

  • OS: Windows 11
  • Latest Claude Desktop

Proposed Solution

Add a setting in Claude Desktop (Settings → Cowork) that lets users specify a custom storage location for the VM. When changed, the app should either migrate the existing bundle to the new location or download it fresh there on next startup.

Alternative Solutions

No response

Priority

High - Significant impact on productivity

Feature Category

Configuration and settings

Use Case Example

No response

Additional Context

No response

extent analysis

TL;DR

To address the issue of Claude Cowork's VM bundle consuming significant space on the primary drive, consider adding a setting to allow users to specify a custom storage location for the VM bundle.

Guidance

  • Investigate the feasibility of implementing a setting in Claude Desktop to let users choose a custom storage location for the VM bundle.
  • When changing the storage location, decide whether to migrate the existing bundle or download it fresh to the new location on next startup.
  • Consider the potential impact of changing the storage location on the application's functionality and user experience.
  • Evaluate the use of NTFS junctions (mklink /J) or other symbolic link methods to redirect the VM bundle to a secondary drive, despite the current failure.

Example

No code example is provided due to the lack of technical implementation details in the issue.

Notes

The proposed solution requires careful consideration of the application's architecture and potential limitations. The issue does not provide enough information about the technical implementation, so a detailed solution cannot be provided.

Recommendation

Apply a workaround by exploring alternative storage solutions or waiting for an official update that addresses this issue, as there is no clear indication of a fixed version available.

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