I purchased a 100m drop proof and water proof 16gb USB 3.0 drive, for this sole purpose lol.

Wouldn't recommend safe though,  I would recommend hiding it. People will expect to look in a safe, if you are literally that worried that someone will break into your house and make off with the safe and your wallet file, why not just put a fake wallet file in the safe and hide the original somewhere else, in the lining of a jacket, or under a molding panel.