Is there a way to change the extension of a folder in Windows Explorer? I have a lot of files on my thumb drive that I don't want the casual snooper to see. Unfortunately, there seems to be a shortage of encryption software compatible with both Windows XP and 98. I know I can obscure individual files by changing their extension to, say, .txt. However, it is wholly impractical to manually change 200 files' extensions. Does anyone know of any portable software that will work with XP and 98 (first edition), or a method of obscuring a folder?