I chose the Kingston Ironkey Keypad 200 because it uses hardware-based encryption and can be accessed without installing software on third party devices. The 8GB version was used because it can be formatted for access from a wide variety of devices (unlike higher capacity drives). An argument can be made for either the USB-A or the USB-C version of the drive (USB-A for people focused on legacy systems and USB-C for people focused on the most current hardware)
Purchase here:
Amazon