DiskInternals Linux Reader 4.22.5.0 Full Activated DiskInternals Linux Reader is a free, read-only file system explorer designed to help Windows users access and recover data from Linux-formatted drives (ext2, ext3, ext4, ReiserFS, XFS, and more). Linux uses different file systems than Windows (typically ext2, ext3, and ext4), so Windows cannot natively read these file systems.