KryoFlux reads "flux transitions" from floppy disks at a very fine resolution.

Because the device operates on data bits at the lowest possible level with very precise timing resolution, it allows modern PCs to read, decode and write floppy disks that use practically any data format or method of copy protection to aid in digital preservation.

[9] It has been tested successfully with many generations of floppy disk drive including 8", 5.25", 3.5" and 3" mechanisms, and dozens of disk formats including numerous schemes originally designed to prevent software piracy, allowing the preservation (typically to an image file stored on hard disk or other modern media) of programs and data that will inevitably succumb to data degradation as the original physical media deteriorates and becomes unreadable over time.

[3] The image files produced may be rewritten to fresh disk media or, more commonly, used with software emulations of the original systems.

Users have detailed[10] various techniques to aid in the recovery of data stored on such marginal disks.