SpaceObServer is a hard disk space manager for Windows that stores disk usage information in an SQL database. It scans directory trees using a background service and stores their structure, sizes and properties in an SQL database. In an Explorer-like user interface the collected data can be viewed and browsed in hierarchical or tabular views, 3D bar, pie, line charts and tree maps. Using the archived data you are able to track the development of the space usage from past to present, and forecast future size usage. A flexible file search, with predefined searches for very big, old or obsolete files allows filtering and listing files directly from the database. A duplicate file search is also included.