If you want to save system spool files, you need to build a list. This allows you to identify specific queues that you want to capture vs. all of them.
You would set this up similar to the following:
Opt List Name Use Type Text
QALLSPLF *BKU *SPL All printed output
Inside you will see…
Seq Library Outq File Job User User data *EXC
10 *ALL *ALL *ALL *ALL *ALL *ALL *INC
I currently have it set to save all outq’s for all users.
See this website for a full explanation of saving and restoring…