Re: What is the file extension for photoshop for the blanks following the period in "photoshop,___"? I have an older desktop which includes older photoshop files which I have asked a technician to extract for me. He asks for the extension. I can't

If you using Windows you can use the control panel Folder options or from Windows File explorer menu tools>Folder options view tab to change what Microsoft hide on you.  Have windows display extension. Apple hide information from users also.