if virus use external storage he need a link to the infected client too...
when you reinstall you broke this link for sure!!
No, that is wrong. A piece of malware that spreads over external storage will simply re-infect when the wallet backup is restored from that storage.
but you mean who the virus source is on external drive???
on USB drive/pen???
if so it is mor simple!!
just format usb!!!
and you do not need to reinstall operating system!
No, your comprehension is not very good. If the virus is on the machine and spreads through USB it will spread with the backup.
sorry...
i'm trying to understand well...
but i'm not EN/US mothertongue..
try to get help from google but with not good results!!!
sorry...