Even though external hard drive sizes are increasing at a rapid rate, you can always find more space on your drive if you just look hard enough. SpaceObServer is a sophisticated and effective hard disk space manager which scans directory trees using a background service, and stores their structure, sizes and properties in an SQL database. Why would you want to do this? Well, for one, it automatically allows you to see - in pie chart form - what's taking up most space on your hard drive at any one time. In addition, if you're interested in tracking your hard disk usage across several months or a long time period, then it allows you to do so instantly. For Windows users, it's very effective because it presents the data in a very easy Explorer style format - in 3D bar, pie charts and tree maps. The good thing is you can see at a glance which files are obsolete and which files are essential so that when it comes to cleaning up your drive, you don't get rid of anything important. It's surprising, using this program, how many files you'll find that are simply taking up space and are absolutely useless. Easy to use and very effective, SapceObserver is an excellent app that will have your hard drive gleaming again in no time.