sheesh..
Someone can code a USB 2.0 Driver, since the USB sockets do support that, we just need the drivers and then activate it through Cios.
then use a 32gb USB flash drive, they have good read speeds, and im sure when you combine it with 2.0 it would be good.
Get a 4gb Micro SD memory card, put it into a SD card adapter, make the 2gb+ drivers for the sd card, this wouldnt be sdhc, it would be standard sd. but then again, SD CARD IS TOO SLOW
Or.. just burn disks..
TBH, I would just burn the disks, but the first method would work, second, way to slow, third method is recommended.
also, You can compress ISO's, But then again that adds to the loading times.