On Fri, 14 Jul 2017 17:22:13 +0200 "Patrick Dupre" pdupre@gmx.com wrote:
However, how could I have destroy the partition table of 3 disks using gparted only?
It is certainly possible to destroy the partition table of 3 disks with gparted. I can't say how you would have done it, or even if you did. I only say that it seems unlikely it was a virus from the USB stick that was responsible for the destruction.