No, it will show you each file that there is inside tmp folder and it's size. So you can find where k9copy stores the temp files. For deleting it you use the rm and rmdir commands through console or you delete them through the normal procedure (file browser).
I guess you are noob. So before using the commands try
. Check the instructions, thus you be sure of what you are doing. rm and rmdir don't have restore. If they delete something you can't restore it.
So be cautious..
Hope I helped.