GIGA R1: USBHostMSD - connect from both cores (but not concurrently) - possible?

[megacct]

Hi, I'm using USBHostMSD on the GIGA R1 M4 core without issue.

However, I would also like to access the same flash drive from the M7 (but not concurrently) without removing/reinserting/resetting.

I have tried unmounting the file system (FAT) on the M4 but I can't see a way to deinit the USBHostMSD. Attempts to USBHostMSD.connect() on the M7 fail once USBHostMSD has been connected on the M4.

Is there a way to disconnect the MSD on one core so it can be connected on the other?

Thanks