Help with file numbering on canon 7D

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1,176
Name
Amin
Edit My Images
Yes
My file numbers have changed from IMG_xxx.jpg to _MGxxx.jpg all of a sudden. Although the numbering is still continuous but the I having been repalced by _ has caused some confusing in the string of flies inside my folder. Does anyone know what must have happened? Have I played with some settings without realising and it changed? I have been trying to make it go back to IMG_ but can't seem to be able to find the menu settings.

Any help would be appreciated

thanks
Amin

EDIT: Oops I think I found the reason. When I changed from sRGB to RGB it changed from IMG to _MG.
So this brings to another question which I assume its a hugely debated one. What do most people shoot? RGB or sRGB? Most of my images are for printing purposes and I do print quite bit, anything from A4 to A2.
 
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