Mount ext4 on Windows: How to Mount ext4 on Windows and Open Linux Drive, Ubuntu Partitions, and Dual-Boot Disks — All Methods Compared
Windows cannot natively read ext4 partitions — it only supports NTFS, FAT32, and exFAT. For dual‑boot users or admins needing Linux data inside Windows, this is a roadblock. The solution is to use specialized tools that let you mount ext4 volumes directly in Windows, browse files, and copy data without booting Linux.
This guide shows the most reliable methods in 2026 to open Linux drives and partitions on Windows, focusing on speed, stability, and safe access.
Why Windows Cannot Read ext4 — The File System Architecture Gap
The Core Incompatibility Between Windows and Linux File Systems
Windows relies on NTFS, a proprietary format with ACL‑based permissions, journaling, and a unique metadata layout. Linux uses ext4, built on open standards with inodes, block groups, extents, and POSIX permissions. Neither OS includes kernel‑level drivers for the other’s file system. When an ext4 partition is connected, Windows Disk Management can parse the partition table but not the ext4 superblock — the volume appears as RAW with no accessible content.
What "RAW" Means in Windows When You Plug In an ext4 Drive
In Disk Management, RAW indicates that Windows sees a partition but cannot identify its file system. The ext4 data is intact — Windows simply lacks the driver to read it. Attempting to open the drive in File Explorer triggers: “You need to format the disk before you can use it.” Do not format. Use ext4 access tools to mount the partition safely without destroying data.
Common Scenarios That Require ext4 Access from Windows
- Dual‑boot PCs → Ubuntu/Fedora alongside Windows 10/11, accessing Linux files without reboot.
- External drives/USB sticks → formatted in ext4 on Linux, later connected to Windows.
- Raspberry Pi microSD cards → FAT32
/bootvisible, ext4 data partition hidden. - Linux servers → transferring data via ext4 external disks to Windows workstations.
- VM disk images → QCOW2 or raw images stored on ext4 volumes that need to be opened in Windows (VMware, Proxmox).
👉 These scenarios highlight why ext4 support in Windows is essential for modern mixed‑OS workflows.
ext4 Mount Software Comparison: All Methods at a Glance
| Tool | Cost | Read | Write | Drive Types | Ease of Use | Windows 11 Support |
|---|---|---|---|---|---|---|
| DiskInternals Linux Writer™ | Free (write) / Paid (full) | ✓ | ✓ | All (USB, internal, SD) | Very easy | ✓ |
| DiskInternals Linux Reader™ | Free | ✓ | ✗ | All | Very easy | ✓ |
| Paragon ExtFS for Windows | ~$39.95 | ✓ | ✓ | All | Easy | ✓ |
| WSL2 (wsl --mount) | Free | ✓ | ✓ | Internal (Win11) / USB (custom kernel) | Technical | Win11 only (native) |
| Ext4Fsd (GitHub) | Free | ✓ | ⚠️ (unstable) | All | Medium | Limited |
| DiskGenius | Free (read) / Paid (write) | ✓ | ✓ (Pro) | All | Easy | ✓ |
Method 1: Open ext4 Drive on Windows with DiskInternals Linux Writer™
What Linux Writer™ Does and Why It Stands Apart
DiskInternals Linux Writer™ is a free Windows utility that provides direct read/write access to Linux ext2, ext3, and ext4 partitions. Unlike command‑line tools or WSL2 setups, it installs a Windows driver that exposes ext4 volumes in File Explorer. You can copy files in and out with drag‑and‑drop, while the driver layer handles POSIX permissions, symbolic links, and journal integrity transparently.
Step‑by‑Step: Mount ext4 Windows Using Linux Writer™
- 1. Download Linux Writer™ from the official site (~20 MB installer).
- 2. Install as Administrator. A reboot may be required.
- 3. Connect the ext4 drive (USB, HDD, SSD, SD card) or ensure the internal Linux partition is visible.
- 4. Launch Linux Writer™ → detected ext2/3/4 partitions appear with size, label, and type.
- 5. Browse by double‑clicking the ext4 partition. Files/folders open in a Windows‑style interface.
- 6. Copy to Windows → select files → right‑click → Save To → choose destination.
- 7. Write to ext4 → drag files from Explorer into Linux Writer™, or use Copy Files Here.
- 8. Unmount before disconnecting external drives to flush the journal and close cleanly.
Linux Writer™ Supported File Systems and Drive Types
- File systems: ext2, ext3, ext4 (read/write).
- Drive types: USB flash, external HDD/SSD, internal SATA/NVMe, microSD/SD cards.
- Virtual disks: VMDK, QCOW2 (when mounted).
- Distributions: Ubuntu, Debian, Fedora, CentOS, Arch, Mint, Raspberry Pi OS, and more.
Method 2: Read ext4 on Windows with DiskInternals Linux Reader™ (Free, No Write)
When Linux Reader™ Is the Right Choice
DiskInternals Linux Reader™ is a free ext4 mounting tool that provides read‑only access to ext2, ext3, ext4, ReiserFS, HFS/HFS+, and other Linux/macOS file systems from Windows. It’s ideal when you only need to browse or copy files from a Linux drive — for example, accessing backups or system partitions. Read‑only mode ensures safety: the ext4 partition cannot be modified or corrupted, which is critical for system drives and backup volumes.
Step‑by‑Step: Open ext4 Disk on Windows via Linux Reader™
- 1. Download & install Linux Reader™ (free, no license required).
- 2. Launch the program. Connect the ext4 drive if external.
- 3. Detect partitions → all drives appear automatically. Select the ext4 partition.
- 4. Browse files/folders in a Windows‑style interface.
- 5. Copy to Windows → right‑click file/folder → Save → choose destination.
Linux Reader™ also supports mounting ext4 volumes as a virtual drive letter, enabling direct access from File Explorer and standard Windows applications.
👉 Use Linux Reader™ when you need safe, read‑only access to ext4 disks without risking accidental writes.
Method 3: Mount Ubuntu Partition Windows Using WSL2 (Free, Technical)
WSL2's Approach to ext4: A Linux Kernel Inside Windows
WSL2 runs a real Linux kernel inside a lightweight Hyper‑V VM. Because it’s genuine Linux, it can mount ext4 partitions natively. Two approaches exist:
wsl --mount(Windows 11 only) → for internal and external physical disks.- usbipd + custom WSL2 kernel (Windows 10/11) → for USB drives, requires compiling a kernel with USB Mass Storage support.
Both provide full read/write access at zero cost. The trade‑off is complexity: wsl --mount takes ~10 minutes to set up, while the custom kernel path can take 30–60 minutes.
Windows 11: Mount ext4 Internal Partition via wsl --mount
- 1. Install WSL2 with Ubuntu:
<code class="language-powershell">wsl --install</code>
Reboot when prompted.
- 2. Identify disk number:
<code class="language-powershell">GET-CimInstance -query "SELECT * from Win32_DiskDrive"</code>
Note the DeviceID (e.g., \\.\PHYSICALDRIVE1).
- 3. Mount ext4 partition::
<code class="language-powershell">wsl --mount \\.\PHYSICALDRIVE1 --partition 2 --type ext4</code>
Replace --partition 2 with the correct partition number.
- 4. Access inside WSL2::
<code class="language-powershell">ls /mnt/wsl/PHYSICALDRIVE1p2</code>
- 5. Access from Windows Explorer: Linux → Ubuntu → mnt → wsl → PHYSICALDRIVE1p2.
- 6. Unmount when done:
<code class="language-powershell">wsl --unmount \\.\PHYSICALDRIVE1</code>
Windows 10: Mount ext4 USB Drive via WSL2 + usbipd
On Windows 10, USB Mass Storage requires a custom WSL2 kernel:
- Install build dependencies in Ubuntu/WSL2.
- Clone Microsoft’s WSL2 kernel source.
- Enable
USB_STORAGE=yin.config. - Build with
make -j$(nproc). - Point
.wslconfigto the compiled kernel. - Use usbipd to attach the USB device to WSL2.
- Mount with standard Linux
mountcommands.
Setup takes 45–60 minutes once, but after the kernel is built, USB ext4 drives mount in under a minute.
👉 WSL2 is the most technical but native way to mount Ubuntu partitions on Windows, offering full read/write access without third‑party tools.
Access ext4 Dual Boot: Opening Ubuntu Partition from Windows
Why Dual‑Boot ext4 Access Requires Extra Care
In a dual‑boot setup, the Ubuntu partition sits on the same disk as Windows but is invisible without ext4 tooling. The risk: if Windows Fast Startup is enabled, NTFS volumes remain in a hibernated state. Writing to Linux partitions or reading them via Windows tools can cause file system inconsistencies. Always disable Fast Startup before accessing ext4 in dual‑boot environments.
Disable Windows Fast Startup Before Accessing Dual‑Boot ext4
- Go to Control Panel → Power Options → Choose what the power buttons do
- Uncheck Turn on fast startup
- Click Save changes
From now on, every shutdown performs a clean unmount, preventing cross‑OS conflicts.
Recommended Method for Dual‑Boot ext4 Windows Access
- Persistent access → Use DiskInternals Linux Writer™ with auto‑mount enabled. The ext4 partition appears as a drive letter in Explorer on every boot.
- Occasional access (Windows 11) → Use
wsl --mountfor free read/write access in minutes, no extra software. - Read‑only recovery → Use DiskInternals Linux Reader™ for safe file extraction without driver installation risk.
👉 In dual‑boot setups, disabling Fast Startup and choosing the right tool ensures safe, consistent access to Ubuntu partitions from Windows.
How to Mount ext4 on Windows: Full Step Comparison by Scenario
| Your Situation | Recommended Method | Why |
|---|---|---|
| External USB ext4 drive, need read/write, want GUI | DiskInternals Linux Writer™ | One-click access, no CLI |
| External USB ext4 drive, read-only, free | DiskInternals Linux Reader™ | Free, safe, GUI-based |
| Dual-boot Ubuntu, persistent drive letter in Windows | Linux Writer™ with auto-mount | Appears in File Explorer on every boot |
| Internal ext4 partition, Windows 11, free | WSL2 wsl --mount | Native, free, 10-min setup |
| Raspberry Pi microSD, copy data to Windows | Linux Reader™ | Read-only copy to Windows — no write risk |
| Linux backup drive, browse + verify files | Linux Reader™ or Linux Writer™ | Both support ext2/3/4 |
| Proxmox or KVM ext4 datastore (USB external) | Linux Writer™ | Full read/write to QCOW2 staging directory |
| One-time file rescue from dead Linux system | Linux Reader™ | Fast, no install friction, free |
| Corporate environment, no WSL2, no third-party | Ext4Fsd | Free driver, read-only mode for safety |
ext4 on Windows: Data Loss Risks and How to Avoid Them
The Three Scenarios That Corrupt ext4 from Windows
1. Unsafe removal Disconnecting a USB ext4 drive while it is mounted in Linux Writer™, WSL2, or any other tool without first using Eject/Unmount risks journal corruption. ext4 relies on its journal for write integrity — an interrupted write leaves uncommitted entries. On the next Linux mount, fsck runs to repair the file system. If corruption is severe, files written since the last checkpoint are lost.
2. Dual‑boot Fast Startup enabled Windows Fast Startup leaves NTFS volumes in a hibernated state. In dual‑boot setups, if Linux writes to ext4 while Windows holds the disk in hibernation, and then Windows mounts the same partition via a driver, metadata conflicts can occur. This can corrupt both NTFS and ext4 partitions. Always disable Fast Startup before cross‑OS access.
3. Ext4Fsd write mode on important volumes Community reports on SuperUser and Linux forums document directory corruption bugs in certain Ext4Fsd builds when write mode is enabled. For critical data, use Ext4Fsd strictly in read‑only mode. Write mode should only be used for non‑essential test volumes.
👉 To avoid data loss: always unmount cleanly, disable Fast Startup in dual‑boot systems, and avoid unstable write drivers on production ext4 volumes.
FAQ
Can Windows 10 and 11 read ext4 natively?
No. Neither Windows 10 nor Windows 11 includes built-in ext4 support. Windows Subsystem for Linux (WSL2) provides ext4 access through a Linux kernel layer, but WSL2 must be installed and configured. Windows 11 adds wsl --mount for internal disk access. For all other scenarios, third-party tools like DiskInternals Linux Writer™ or Linux Reader™ are required.What is the best free ext4 mounting tool for Windows?
DiskInternals Linux Reader™ is the best free option for read-only access — no setup required, supports ext2/3/4 and other Linux file systems, and works on Windows 7 through 11. For free read/write access, WSL2 (wsl --mount on Windows 11) is the only cost-free path, but requires WSL2 installation.Is it safe to write to an ext4 partition from Windows?
Yes — with the right tool. DiskInternals Linux Writer™ and Paragon ExtFS both provide safe write access through tested Windows kernel drivers. Always unmount the partition cleanly before disconnecting or rebooting. Avoid Ext4Fsd in write mode for critical data.Why does Windows show my ext4 drive as RAW?
Windows cannot parse the ext4 superblock or directory structure. It detects the partition exists but cannot identify the file system — so it displays "RAW." The data is intact. Do not format it. Use DiskInternals Linux Reader™ or Linux Writer™ to access the contents.Can I access my Ubuntu dual-boot partition from Windows without rebooting?
Yes. Install DiskInternals Linux Writer™ and disable Windows Fast Startup. The Ubuntu ext4 partition mounts as a drive letter and appears in Windows File Explorer — accessible without rebooting into Linux.What happens if I accidentally close the ext4 mount tool without ejecting?
The ext4 journal flags the volume as requiring recovery. On the next Linux mount, the ext4 journal is replayed automatically — most cases recover without data loss. Files written to the partition but not yet flushed from the driver's write cache at the moment of abrupt closure may be lost. Always use the Unmount or Eject option before closing the tool.