MTP_Teensy example "mtp-logger.ino" compile error, on T4.1.

[WMXZ]

MTP devices don't show up as drive letters, it must be some other device connected to your PC.

yes, for example a dual microSD card reader will show up as two devices, even without SD card inserted

 

[Fluxanode]

It was a monitor that had usb and card reader capability.