The PSP, in all its multifunctional glory, recognizes only certain file formats. That’s understandable, as virtually any device—from MP3 and video players to PDAs—can do only so much. Firmware revisions have broadened the PSP’s media-file-handling abilities, but even so, it has its limitations.
You can determine a media file’s format by checking out the file’s extension. The extension consists of the three letters following the last dot in the file’s name. By default, Windows XP hides the extensions of file types it recognizes.
You can view file extensions in Windows XP through two methods. You can right-click any file in Windows Explorer and choose Properties from the context menu; the resulting dialog box ...