How i can used encrypted fully hidden encrypted flash drive in hidden os ?

[Nikita11]

Hello, i have hidden OS , and i want to open flash usb in this system (HIDDEN), i try to:

1. encrypted usb drive with hidden (full encrypted usb drive), and fake .
2. so when i try open this in hidden os, i always see error, like broken header and e.t.
3. how i can used encrypted usb flash in hidden os??