Why are photos im taking not appearing in gallery?

[AC Question]

I have a samsung galaxy tab 2. Fine until today when, all of a sudden, photos/videos i make are not appearing in the gallery. They are on the sd card but not showing the gallery to look at/edit. Also, all previous pics I've taken have disappeared from the gallery and the only albums that are in my gallery now are picassa ones. Any suggestions gratefully received! Thanks

 

[the tall guy]

sounds like an SD Card issue, try removing the SD card and putting it in another device, i.e. a PC and see if you can see the images that way?