Trying to force Norton Security and Back Up to force flash drive scans when plugged in

In Settings I have the Removable Media Scan ON and I expected this to force auto scan when I plug in a flash drive.  I was able to do a drive scan for a flash drive under scan, custom scan, select drive.  But, I want an auto scan every time I plug in a flash drive, since I am not sure where it has been used in the past.  

I need a reply ASAP, like Yesterday!!!!!!!!!!!!

 

Thanks

Daniel