The Recycle Bin is constructed so that it keeps whatever ends up there until you manually delete it (or until the allocated disk space fills up). If the disk space fills up, then the oldest files in the Recycle Bin are deleted to make way for the newer items. If you have 8GB (or more) set aside for the Recycle Bin, the sheer size of the allocated area means you’re wasting a lot of disk space. The solution is to change the amount of disk space allocated to the Recycle Bin. This is what you need to do. Right click the Recycle Bin icon and choose "Properties" In the "Properties" dialog box, under the "Global" tab, select the "Use One Setting for All Drives option". Use the slider to specify a smaller percentage of your hard drive for Recycle Bin space. If you have a large drive or several large drives, consider setting the slider as low as one percent. (Remember that one percent of 80GB is 800MB. That’s still a large block of disk space for the Recycle Bin.) Click "OK". Resizing the Recycle Bin help unclutter your system as Windows doesn’t need to track as many deleted files, the operating system is more responsive.
The Recycle Bin is a flexible place, willing to enlarge itself, as necessary, to accept your recently deleted files. By default, the space allocated by Windows for the Recycle Bin is up to ten percent of your hard-drive space. If you think about it, that’s a ton of space. Say you have an 80GB drive. That means that the Recycle Bin can possibly occupy up to 8GB of your drive. That could be a huge number of files and is probably more than you would ever need.