@mngrif There's a page for that model in Wiki: https://en.wikipedia.org/wiki/Toshiba_T3100

"The T3100e had a 12 MHz 80286 CPU (switchable to 6 MHz, 1 MB RAM and a 20 MB hard drive."

I would guess a 3.5"HD, ide possibly, although the date on the system is pretty early, 1986 launch of the model.

Vintage computing is fun, nice that you might salvage this one. Good luck!