HOW TO Read Linux ext4 Files on Windows with 7-Zip (No Drivers Needed)

File systems are the organizational systems that decide how data is stored, named, located, and protected on a disk, SSD, USB drive, or partition. They handle directories, file metadata (permissions, timestamps, ownership), free space tracking, and more.

Windows side

Windows primarily uses:

• NTFS — the modern default. It supports journaling (for crash recovery), large files and volumes, fine-grained permissions, encryption, and compression.
• FAT32 and exFAT — simpler, widely used on removable media (USB sticks, SD cards) because they are highly cross-compatible with other operating systems.

Windows has no native support for the main Linux file systems. When you connect a drive formatted with ext2/3/4, Windows typically sees it as “RAW” or unknown and may offer to format it (which would destroy the data).

Linux side

Most Linux distributions default to the ext family:

• ext2 — the older, non-journaling version.
• ext3 — added journaling for better reliability.
• ext4 — the current standard. It adds extents (more efficient storage of large files), larger volume/file size limits, better performance, and other improvements.

Linux has relatively good support for Windows file systems. Modern kernels include solid NTFS drivers (including the newer ntfs3 driver), so Linux can usually read and write NTFS volumes reasonably well.

The compatibility imbalance

• Going from Linux → Windows partitions is usually straightforward.
• Going the other way (Windows → Linux partitions) is not. You normally need third-party tools or drivers (DiskInternals Linux Reader, Ext2Fsd/Ext4Fsd forks, Paragon’s commercial drivers, etc.) or workarounds such as mounting the disk inside WSL2 (wsl --mount).
  

Unlike the original Windows Subsystem for Linux 1 or WSL 1 (which translated Linux system calls into Windows ones), WSL2 runs an actual Linux kernel on Windows (Windows 10, 11, and Server) inside a lightweight, Microsoft-managed virtual machine.

How 7-Zip fits in

7-Zip is an open-source file archiver, a utility used to place groups of files within compressed containers known as "archives".

7-Zip includes built-in read-only support for the Ext format (ext2, ext3, and ext4). It does not rely on Windows mounting the volume. Instead, it can:

1. Open disk image files (.img, etc.) that contain an ext filesystem, or
2. Access a raw physical disk directly by running 7-Zip File Manager as administrator and typing a path like:\\.\PhysicalDriveN
   (where N is the disk number shown in Disk Management).

7-Zip then parses the filesystem structures itself (superblock, inodes, directory entries, etc.) and presents the contents like an archive. You can browse folders and extract files, but you cannot write changes back.

This is why the original post was surprised: a common archive tool quietly provides a lightweight, no-extra-driver way to pull files from Linux-formatted drives or partitions that Windows itself refuses to mount. It’s especially useful for USB drives or dual-boot recovery situations where you just need to grab data quickly and safely (read-only).

7-Zip is like a super-smart Swiss Army knife!

co-written with Grok