FOLLOW-UP....Sample:
AOS-CX 8320 How to list files on the USB drive:
HPE-AOSCX8320# usb mount
HPE-AOSCX8320# start-shell
HPE-AOSCX8320:~$ cd /mnt/usb
HPE-AOSCX8320:/mnt/usb$ ls c*
config1-20200213 config1-20200202 config1-20191101config1.txt
HPE-AOSCX8320:~$ exit
HPE-AOSCX8320# usb unmount
HPE-AOSCX8320#