Storing partial unencrypted wallet data on a fingerprint-encrypted USB drive or writing it directly on paper doesn't make much difference. These fingerprint-encrypted USB drives are specifically designed for protecting corporate trade secrets, and I don't think they can be easily cracked.
Digital storage has other shortcomings that just being hacked/cracked. For example hardware problems that is where the USB disk is harmed either physically or due to electrical issues or other things and the data on it becomes inaccessible. Or we have the data decay/degradation by passage of time.