Dissapeared photos help Samsung Galaxy S2?

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http://askubuntu.com – My Samsung Galaxy s2 said it was full. Therefore, when I connected it to the computer, only a few files were there the rest of the images seemed to have dissapeared. So, when I cut the camera folder and pasted in onto my pc, the recent photos that weren't visible on the pc have been lost as well. What do I do ? I need help please. Thank you (HowTos)