Many of us don’t even pay attention anymore, but having 64GB in a USB key is actually really cool. Sandisk is taking advantage of this extra capacity to build a new product with the Sandisk Ultra Backup. The idea is that a dumb 64GB drive is much less useful than one with embedded software that can sweep a specific location in your computer and backup + encrypt all the files using an AES* encryption. The Ultra Backup comes in 8GB ($40) to 64GB ($200) capacity.
*AES is an algorithm widely used in the computing, the banking industry and even the military. Even with tremendous computing power, it should take decades or much more to decrypt something.