USB pens supported up to the maximum capacity of the host PDA or phone. (Limited by the SDHC specification to maximum 32GB)
this means that the mobi adapter has been tested up to 32gb because that is the highest that any phone can support
So they cant garanty that it would work over that due to not testing but by the way they have written it i would assume it could suport usb flash drives over 32gb
Im going to give this a go because i dont think anyone else has and i am intrguied about this
sorry for spelling