SpaceSniffer is a nice software to have in everyone's arsenal of tools. It is portable, small, does run without admin rights, and is fast. It shows graphically the space used by files and folders, updating it dynamically and continuously. It does not allow saving or restoring previous scans. Nevertheless, it is pretty fast. It allows filtering in and out, and with independent conditions. It is not the single solution for this end, but it certainly can be more useful than other ones around, in certain circumstances. Code: home: http://www.uderzo.it/main_products/space_sniffer/index.html features: http://www.uderzo.it/main_products/space_sniffer/features.html download page: http://www.uderzo.it/main_products/space_sniffer/download.html direct download link (I'd recommend you get it straight from their website, but if you want that much comfort): https://www.fosshub.com/SpaceSniffer.html/spacesniffer_1_3_0_2.zip Warningno hide tags for free stuff! next time will be an official warning!