Password on thumb drive folders without software

What kind of files?

There are ways to p/w protect files before they're copied to the thumb driver. For example, you can create a Word document, put a p/w on it and then save it to either your hard drive or the thumb drive.

Or, do you want to p/w protect the thumb drive itself so file and folder names can't even be seen without providing the p/w?

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To purchase Thumb Drives with their own Security built in. That way you can copy files tot he Thumb Drive and it can be used anywhere and still request a Password to allow access.

USB Thumb Drives like the U3 have this function and I'm assuming that you don't or can't download any software because you will have no control over what this Thumb Drive gets plugged into.

Col