RAID-1 won't make it faster...
.... while RAID-0 will just make it more risky.
RAID-1 on fast disks is OK as "workspace" area which allows to keep on working if one of the disk fails, but which is obviously backed up to a reliable storage. Anyway, RAID-1 may be better then nothing if more disks hinder moving the enclosure around easily.
RAID-0 is useful only when a large space and speed needs trumps everything else - and contents can be reloaded as needed.
Also, even if the USB port is an hub, you can't download directly from a digital camera (and usually you can download faster directly from the card).
Biting the hand that feeds IT
