by David Hakala
If your hard drive is filling up, you can recover quite a bit of space by compressing files that you do not use often, or by compressing all the files in selected folders or an entire hard disk. Windows XP Pro and Home Editions support file compression natively. There are a few things to consider before compressing files, however.
You must have your drive volume (i. e., C:) formatted with the NTFS file system. Compression is not supported on FAT16 or FAT32 volumes.
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