- Nobody who isn't a nerd will know what MTP and PTP stand for.
- This screen could be broken down, roughly, into three large buttons for Windows, Mac, and Linux with no extra text. Windows needs no explanatory text or further configuration. The screen displayed after the Mac button is touched could instruct the user to download File Transfer for Mac. The screen after the Linux button could contain instructions for whatever it is Linux users do to connect via PTP. Heck, you could even show Linux users the current screen; they probably won't care.
Your three choices (Windows, Mac, Linux) won't work. If you want to go that route, the question would be "what application do you use to transfer your files"? You can see what a rat's nest that can turn into. Maybe you can split it into 3 categories: file manager, photo manager, music/media manager and then have further instructions on a second screen.
But those Win/Mac/Linux buttons would be simply a wrong solution -- the idea is to peak a standard that will work with a certain application, not OS. You just can't make it simpler without sacrificing functionality.
Clueless user will of course be left only with an option just to try both, but IMO this glitch is way better than macky "I won't work, but this is their fault".
- There's way too much text. Users don't like reading. http://www.codinghorror.com/blog/2009/10/treating-user-myopi...
- Nobody who isn't a nerd will know what MTP and PTP stand for.
- This screen could be broken down, roughly, into three large buttons for Windows, Mac, and Linux with no extra text. Windows needs no explanatory text or further configuration. The screen displayed after the Mac button is touched could instruct the user to download File Transfer for Mac. The screen after the Linux button could contain instructions for whatever it is Linux users do to connect via PTP. Heck, you could even show Linux users the current screen; they probably won't care.