The Citrix universal printer driver (UPD) can generate big spool files. Printing within the LAN and big print data is not dramatic, but over WAN connection the print data can become a massive issue. Quite often printouts from Adobe documents but also other files like Word etc. can become very big.
How does it come to such big print data and how to avoid it? If you know about it, then you can reduce the size by 99%!