A few days ago my friend experienced "lost disk space" on his 8 GB pen-drive while using the Videocon D2H external-disk TV recording functionality. The DTH STB asked to format the device to enable recording, after which only 149MB was left visible/usable on Windows. While inspecting the disk from "Windows Disk Management" console, it was clear the space was still there but is of an unknown format, the recording feature on STB deliberately converted the disk to a custom file-system to prevent piracy of recorded material. We simply need to reclaim the space using special utilities as demonstrated ahead.

Windows Disk Management Showing Unrecognized File-system Space

FosiX Lite is a free tool designed to let users analyze their disk space usage graphically, We have written about a similar free disk usage charting tool Space Monger earlier.

FosiX provides a simple and easy to diagnose graphical view of the disk-drive with detailed space usage statistics and graphs letting your easily pinpoint the space occupiers, The software lets you easily navigate through those visualized folders by clicking on the chart elements or by using keyboard shortcuts, The handy utility also provides options to easily eliminate temporary files, clean up shortcuts, delete empty folders and clean up internet traces from your hard-disk to free up some space.