U3 refers to a type of software that comes pre-installed on some USB flash drives. Think of a USB flash drive like a tiny digital backpack that you can carry around with you. The U3 software is like a special compartment in that backpack where you can store different programs and files.
Now, let's imagine you want to use your USB flash drive on a different computer, like when you bring it to school or your friend's house. But what if the computer doesn't have the same programs you need to use on your USB drive? That's where the U3 software comes in handy.
With U3, you can install programs directly onto the software in the USB drive, and use them on any computer that supports the U3 software. It's like bringing your own mini computer with you wherever you go!
But don't worry, using U3 is actually really easy. When you plug your flash drive into a computer, a menu will pop up that shows you all the programs you've installed on your U3. From there, you can just click on the program you want to use, and it will start up right from the USB drive.
So, in short, U3 is a special type of software that allows you to store and use programs from your USB flash drive on any computer.