Do you mean put a power point file into a flash disk? You can select the file fisrt, then click the right button to select copy. Open the flash disk, then press key ctrl and V to paste the file. It is done.
How to put a powerpoint on a usb?
Just make a powerpoint, then go to "save as" or "save". Go into your USB file and go into it. Then you just save! Hope this was helpful.