I'm looking for software free or paid which would enable:
Upon connection of a USB drive protected by this software, require a correct password to be entered. And if the password entered is incorrect, access to the USB drive shouldn't be granted (due to encryption etc.).
But if the application protecting the contents of the USB drive for whatever reason wasn't activated or present, the files on the USB drive would remain encrypted etc.
Software protecting access to the USB drive should be completely stored on the USB drive, requiring no extra software on the side of the machine which the USB drive is connecting to.
Security is a priority
I would like this software to be compatible with Windows.