O.K. someone shed light on this scenario please. I run Xp pro, cluster size is 512 bytes. I downloaded some filters and some 1700 in one folder. The ext was .ace so i downloaded the decompression app to use it as power desk and win zip don't support it. When I unzipped they went from 2 megs to 50, yes 50 times their original size, 100 meg. I decided to compress them back and stick em on my zip drive, which they zipped down to 1.87 megs. The point is, when I download some zip files they unzip 3 times, 4 times, 10 times and in this case 100 times bigger. I have tried myself to zip up 100 meg of files from my zip drive into a smaller file for some space and I am lucky to gain 4 meg of space. Is it a fact they were compressed on fat or fat 32 and when hitting my 512 byte cluster ntfs drive explode to much larger size. Can someone shed a little light on it, as I am quite impressed with win ace and would like to continue after the trial by buying it.