http://forums.testdriveunlimited2.com/showthread.php?t=31977
Instructions:
1. Pause the game
2. Go to the screenshot menu
3. Press the PS button
3. Navigate to "Pictures" on the XMB
4. You should see a "TDU2 Screenshot" option, select it
5. Press X to save the screenshot.
A new folder should appear under pictures in the XMB (atleast while TDU2 is running) click X to enter the folder, highlight the picture and press triangle. It willa sk to exit the game, accept. you should now be viewing the picture in fullscreen mode. Press triangle again to bring up options, select "Copy", check the box next to your picture and highligh "OK" and press X. It will now prompt you to have the screenshot to either a USB drive or an SD card.