I have been running pathfinder alongside mac os native finder, & when I have deleted some files off my external hard drive, I see my trash looks full, so I do an empty trash securely, the finder icon jumps, & I get a message saying that I don not have permission to do the operation, & it gives me the option to continue or cancel. So the trash never gets completely emptied, when my hard drive is connected & running. I notice when my external hard drive is turned off & not connected & running, & when I have no thumb drives or external hard drives connected, the trash is empty. Is there some sort of conflict between finder & pathfinder? I have looked in pathfinders preferences, & there is an option to shut off finder, but there is a waring that shutting off the native finder could interfere with mac operating system functions like time machine, etc, so I have left finder running & to run as well.