Hi when I want to save an image on the Desire C I select and hold on the image after a short while a menu pops up and near the bottom the option to save image
select this. You will see download on the notifications bar pull this down and select the downloaded option you can then view the image.
The image is downloaded on mine to a folder on the SD card called Downloads
I use Astro file manager to view my files via the manage my files option but it usefull for other things app backup for one
Hope this helps with your first question