If the recent Symantec ICSP Neural definition update has upgraded your Neural scanner engine to version Neural 5.0.0.xxx, and you have rebooted the scanner station afterwards, scanning of the USB mass storage devices fails. Symantec has released ICSP Neural 6.0.2 to resolve this issue.
Note: If you have not rebooted the scanner station after the recent definition update (which upgraded your Neural scanner engine to version Neural 5.0.0.xxx), scanning of the USB mass storage devices is successful. In this scenario, Symantec recommends you to upgrade to version 6.0.2 and then consider rebooting the scanner station to avoid any potential issue.
Upgrade to ICSP Neural version 6.0.2.