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		| ...can I just delete the larger files and keep the smaller ones???? | 
	
 No, unfortunately. There actually is 
ONLY one file for the photo...the larger one that you uploaded.
Since it would display w-a-a-y off screen because of its size... the Gallery software "creates" a smaller version for display when it senses an image that is too large.
It is rendered when you view it...so, it is not a separate image file.