Time machine with 2 back up drives

Can I have more then one usb drive to use for back ups in time machine?
I have 2 usb drives i'd like to use for back up. Time machine doesn't seem to allow you to have 2 separate drives at the same time for back up so I'm manually using 1 usb back up drive for some drives and the other usb back up drive for the other drives.
thanks
Jason

ok that's what I thought.
I'm doing it manually which seems to work ok, but it would be nice to have TM do it.
I guess TM isn't designed for people doing video work.
Unless I can some how join my 2 usb drives together in a Raid so TM sees it as one drive?
Ever heard of that?
thanks

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