The PxMM can work with data from an external or shared drive. Mounting is the software process in the PxMM that enables it to read and write data to/from a shared drive. If the mounting process fails in the PxMM the following message will appear in the IDE Controller Message Log.
Shared Drive failed to mount. ExitCode: 1, Message:Network configuration: Mount the shared directory gcode to /mount/shared
One common cause in a Windows 10 operating system is that the SMB1 was disabled. To enable it: