How to setup USB Cold Storage for Bitcoin and Monero? Is it possible to keep many currencies (Bitcoin, Monero...) on one USB drive? If not, how can I setup USB Cold Storage for Bitcoin and Monero?
Yes, it is possible.

The difference between a HDD and a USB stick is HDD is attached to your computer most of the time exposed to internet, USB sticks on the otherhand can be taken out and can be kept in a vault. Therefore you can store multiple cryptocurrencies in a USB stick.