The PP file explorer is hard coded to only look in one location. I recall seeing it the other day when I was adding new probing buttons to PP. Hold tight and let me see if I can sort out a hack.
In the meantime, you can bring up terminal by clicking crtl+alt+x. In terminal type in 'nautilus'. That will bring up a file explorer window and you should see your shares. Copy your files into Operator\gcode (that's where PP is looking)