I have been attempting to back up 3 seperate computers lately and Acronis is not compressing on any of them. I have a lot of details below but will try to avoid being lengthy. For example, I have a laptop that is taking up 70gb (160gb hd) and when I start the backup, it estimates it will be about 35gb (50% compression). However, after it finishes it's exactly 70gb! Now, this computer does have probably about 10-15gb of pictures, but otherwise no other media the rest is just documents and the standard XP Pro image. This is the same case with another machine I have (except the other machine is 150gb out of 500gb and it compresses to a 150gb file). I have refortmated the backup hardrive and done a dskchk. I've also verified that the 'compress drive to save disk space' is unchecked. I've also done a dskchk on one the computer that has 70gb of data and it still came out 70gb! Any thoughts on this? I have always done the 'high' compression. Thanks in advance for any help. I did do a search on other compression issues in this forum but I couldn't seem to find my issue. Thanks!