This issue existed from day 1 and confused me. Originally I assumed my PC USB outlet was defective but after I needed to add an extension USB cable between PC to 950XL I was surprised that connection was made. Later I discovered PC USB was a USB 3.0 outlet and 950XL included cable failed to generate file access to 950XL SD card and memory folders & files but when accidentally I used an old USB 2.0 extension cable between PC USB 3.0 outlet and 950XL cable then PC sounded with PC-950XL connection made and I could see folders & files on 950XL via PC explorer.