Personally, I would never plug a USB into my computer that I didn't personally purchase from a well-known, reputable manufacturer and remove from the wrapper, or one that had been plugged into another computer for fear of cross-contamination of nasties, such as browser hijackers, malware, adware, spyware, or greyware.
We block USBs on our work computers via software.
Gwen Pekuri, CPHIT, CPHIE
We provide paper copies of records when requested. We do not accept any media (CD's, flash drives) from patients for record copying.