USBMSD and USBSerial Simultaneously

Hi,

I have a NUCLEO-F767ZI and I am wondering if it is possible to have both a USBMSD and USBSerial both working at the same time? I can declare both objects and use the USBSerial printf, and that works, but there is no MSD coming up in file explorer. If I comment out the USBSerial, then the USBMSD works and mounts. Is this not supported or is there something specific I need to do?

Composite USB devices are not supported.

Previous discussion: