You can scan external drives, flash drives, etc with a full system scan. The drive is recognized and it will scan it as if it were part of your system. I am not currently using my PDA as I am waiting to upgrade. However my last PDA had a "base/hub" to transfer files as it was not infrared capable yet (nor wireless). In that case I wonder how difficult it would be to have the system recognize the PDA as an external device and scan it as long as it was powered on. I will have to do some research in my studies in the world of IST.
