We are currently resolving a similar issue (FTP of large data files between 3000's). I poked around, and found the LZW utility to work very well. It compressed our data (ASCII, w/ lot of blanks) about twice as much as MOVER, and did not lose the file attributes either. Since MOVER uses the POSIX naming conventions, when you extract a file it also added an ACD to it...I'm not sure if this is bad or not, but we are a non-POSIX shop at the moment, and I liked the fact that LZW left the file in the same shape that it found it. Any comments or experience using LZW? How does the compression algorithms compare to GZIP? I couldn't get the copy of GZIP I downloaded to run, so I didn't even try it. Mike Wanzong Project Leader California Compensation Insurance Co. [log in to unmask]