Windows XP includes a built in compression utility which can save you some valuable space on your hard disk by archiving little used files. Working similarly to compression programs such as PKZIP and WINRAR, the built in software reduces the space your files take up on the disk at the penalty of increased disk access time for the compressed files in question. There are several ways of compressing data on your system: If you have a pre-existing folder and would like to compress everything in it, right click on the folder, select 'properties' then the 'advanced' button at the bottom. In the 'compress or encrypt attributes' section, check the 'compress contents to save disk space' option.
If you wish to create a compressed folder for a file or folder separate from the one it is in now, right click on the item you wish to compress and choose 'send to\compressed (zipped) folder.' This will create a new compressed folder in the same location as the original file or folder.