Why does Google Photos take up so much memory space on my iPad?  
Added (1). The thing is I downloaded it, passed my pics to it and then out of a sudden it was eating my memory. It is using 2.5gb of my memory and I cannot take that chances. Is there a way to avoid this, to stop this. I need that memory space for important stuff.  
Added (2). I deleted every pic of my gallery to have them all in the app but from 240mb the app jumped to eat 2.5gb as I said.
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Why does Google Photos take up so much memory space on my iPad?