The trick lies in activating the tablet! And not the media.
E-tablets are used to check and download stuff from SD-memory cards. USB-sticks have no function with E-tablets whatsoever AFAIK. Simply have SD-memory cards in inventory and 'a’ctivate the E-tablet. I recommend wielding the tablet for quick repeated successive use.
Also, you can also take photographs of monsters, transfer the data to an SD-card, and then to the tablet. Zombie photography is a potential hobby. Photograph ALL the zombie types. I’m unaware if the photos serve any meaningful function.