Xinorbis 4.2.6a : hard disk analyser, freeware.

[PoBoy]

"Xinorbis is a simple but powerful hard disk analyser. Using a sophisticated mix of graphs, tables and tree displays, it gives the user a complete overview of the contents of a hard disk, folder, removable or network drive."

freshney.org :: Xinorbis

portable ver avail too.

Features
analyse a single drive, folder or merge several together in one report

view the results by file type, attributes, size, user (owner) and date

the Folder History feature allows you to compare the contents of a folder or drive at times and dates

in-bullt powerful search engine (+ save results to a file or clipboard)

find duplicate files (by name and size)

complex report generation (with many user customisations) with export to HTML, ASCII, CSV or XML

save reports and tables for later comparison or for inclusion in other documents

shell support, scan a directory through Windows Explorer

updated regularly