The Pi 1 was only capable of powering 100ma devices over usb but you could still find portable USB drives that could run on that, although admittedly not reliably. A pi 3b+ is absolutely fine for 500ma steady on each port, as long as you have a good enough power supply.
I think it's a 3b+
I'm not too worried about Uber quick performance. As long as I can stream HD video.