Came pre installed on a store bought usb
I bought a new SanDisk 64gb usb yesterday. When I tried to flash an img on it gnome-disk said it was read only so I opened it with a file explorer*.* Its name was tails and it already had folders like EFI and sysLinux, which was very suspicious so I unmounted it. After that it did not work on any port on any device, failing to connect entirely and i returned it to the store as a defective product.
Do I have to worry about viruses?