When I plug the external drive Kaspersky bounces back and forth from it without been able to enter. It does a 1 or two file scan, ends, and goes again to the next scan every minute “indefinitely”. If I buy an antivirus software and it cannot do its job cleaning a HD it seems to me that it is an Antivirus issue. The external HD is operational to open files and to gobble the space I create by erasing folders - but not to save in it when all space is taken - and works to consume any space I make in it. IS ALIVE, is not a HD malfunction. I am not familiar with the technical details but it seem like an MBR takeover virus.