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How to Install Docker on Another Drive in Windows (D: Drive Guide)

Is your C: drive full? Learn how to install Docker Desktop in a custom location (like a D: drive) on Windows 10 or 11 using CLI flags for WSL2 data and container roots.

docker topic devops topic windows topic
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While installing Docker on Windows typically forces it onto your C: drive, many developers run out of space as images and containers grow. This guide shows you how to bypass the GUI and use CLI flags to install Docker Desktop in a custom location (e.g., D:\Docker) while also moving the heavy WSL2 data roots.

TL;DR: To save your C: drive from Docker’s growing appetite, bypass the GUI installer. Open PowerShell as Admin and run: start /w "" "Docker Desktop Installer.exe" install --accept-license --installation-dir="D:\Docker" --wsl-default-data-root="D:\Docker\wsl"

Requirements for Custom Installation

To ensure a smooth migration to another drive, verify you meet these criteria:

  • OS: Windows 10 or 11 (with Hyper-V and WSL 2 enabled).
  • Installer: The latest Docker Desktop .exe downloaded here.
  • Permissions: Administrator access.
  • Storage: A secondary drive (D:, E:, etc.) with at least 64GB of free space (SSD recommended for performance).

Preparation

  1. Create Folders: Create your target directory. For example: D:\Containers.
  2. Cleanup: If you have an existing Docker installation, back up your volumes and uninstall it first.
  3. Stop Services: Open PowerShell as admin and run sc.exe stop docker to ensure no locks are active.

For a clean setup, use a structure like this on your secondary drive:

text 
1D:\CONTAINERS
2├───docker (App files)
3└───wsl    (Linux container data)
4└───windows-data (Windows Container Data)

Step-by-Step Installation via CLI

The GUI installer doesn’t offer a “Browse” button for the path. You must run it from the command line (PowerShell or CMD) with specific flags.

The Complete Command:

powershell 
1start /w "" "Docker Desktop Installer.exe" install --accept-license \
2--installation-dir="D:\Containers\docker" \
3--wsl-default-data-root="D:\Containers\wsl" \
4--windows-containers-default-data-root="D:\Containers\windows-data"

Flag Explanations:

  • --installation-dir: Moves the actual Docker application binaries (usually C:\Program Files\Docker\Docker).
  • --wsl-default-data-root: The most important flag. This moves the massive ext4.vhdx files where your Linux containers actually live.
  • --windows-containers-default-data-root: Moves the data root for Windows-native containers.

Note: Replace D:\Containers with your actual drive letter.

Post-Installation & Verification

  1. Restart your computer to ensure all registry changes and WSL paths are initialized.
  2. Verify paths: Open PowerShell and run:
    powershell 
    1docker info | select-string "Docker Root Dir"
  3. Check WSL: Verify the data is being stored in your new location by checking the folder size of your wsl directory after pulling a few large images.

Why move Docker to another drive?

  • Performance: Offloading I/O to a dedicated SSD can prevent OS lag during heavy builds.
  • Stability: Prevents “Disk Full” errors that can crash Windows when Docker pulls large image layers.
  • Organization: Keeps your system drive lean and focused strictly on the OS.

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