I am in the process of making a custom retropie handheld and have ran into an issue with my pie 3b. I recently (and carefully) removed and desolderd the usb ports from my pie. After a small hiccup of having to redo the image for retropie everything works as normal. What my plan was is too use jumper wires to physically move the usb ports elsware in the case. I couldn't fit an usb extension in, for the ports being right against the a,b,x,y buttons pcb. So I thought to remove them and physically move them. After much research into the dangers I attempted the move. Everything powers up, no power issues the usb keyboard works fine when plugged in. The problem I'm having is I was using a 128gb compact thumb drive and symlink to store my ps1 games but now the raspberry pie does not pick it up. I have tried reformatting the stick and several other things. I am looking for any ideas on the subject cause I'm out. I don't think its a wireing issue but I can double check.