You deleted everything from your USB key or a drive, so there should be enough free space to copy the new files, but you still get the not enough free space message in Mac OS X? This is what you need to do.
You probably seen video where clips are playing in a title text and made you wondered how the heck to they do that. Well it's pretty easy to create the video in text effect with Adobe Premiere.
Windows Explorer does not have menu displayed by default like you were used to in previous versions. To activate and keep it permanently visible follow this tutorial.