Don’t leave devices unattended near strangers.
Someone could quickly install a USB device that could capture keystrokes, pictures, sounds and data without you knowing.
Don’t plug unknown USB drives into your devices.
Any unexpected USB should be received with caution. Unsuspecting recipients who plug them into their devices are at great risk for malware.
Completely destroy old USB flash drives.
Delete (wipe, if possible), reformat, and then physically destroy the USB drive so no one can recover the data.