What is USB debugging? How do I drag files from PC to Incredible?

[CFD323]

I was cruising an Incredible manual online and I saw this screen about connecting the Inc to a PC. I'm new to Android but I did have an Eris for a few days to try out. On that phone I would hook it to my laptop, open the notifications bar, and choose "Mount" to be able to drag files back and forth.

In this picture, there is no "Mount" choice. How do you drag files back & forth?

Also, what is USB debugging? Do I need to select that in order to drag files back and forth?

Thanks.

 

[Reddog80p]

I think if the disk drive option is ticked when you connect your device to your pc it should install drivers and a pop up box should appear asking you what you would like to do. Select view folders and files.