USB attached but not accessible

How do I make it work???


Image Description:
photo of my screen showing Dom0 Terminal and the qube VM Terminal
• Dom0:
I had entered the

qvm-usb attach qfile-bk sys-usb:4-10

Returned with,
“device … already attached to qfile-bk”

However in the next Terminal from the qfile-bk VM
I input the following,

sudo mount /dev/xvdi /mnt/removable

Returned with this message,
“mount: /mnt/removable: mount point does not exist. dmesg(1) may have more information after failed mount system call.”

Been trying to no avail, please help