Expansion options, what else can I connect to a TX2 development kit ??

Hard drives.
Camaras.
Wifi antennas

Hi josepimentel375,

Welcome to Jetson & Embedded Systems developer forum.
Yes, all items are possible, but depends on what kind of interface you want to connect.

You can refer to below wiki to get more info of peripherals and use cases:
https://elinux.org/Jetson_TX2

Also can use search forum function to find relevant topics:
https://devtalk.nvidia.com/search/more/sitecommentsearch/expansion%20TX2/

Cheers