When you connect your phone to a keyboard, monitor, and mouse, your phone will act as a basic PC running an expanded Android version of Senitrus OS. The OS/Applications is located on the C:/ drive, so you would want to only manipulate the files on your B:/ drive. If you are using the dock, you would also have an A:/ drive. All handhelds (including A series) will support this feature. It would also allow the ability to dock, and work with an SD Card, or USB-C thumb drive. Since you are using your USB-C port for connecting to the monitor, you would likely want a phone dock to connect the phone to multiple drives. All Senitrus phone docks will have an SDUC card reader which will highlight your A:/ drive. Desktop is only available on handheld.