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					Originally Posted by  HarryT
					 
				 
				That's exactly why it asks you, so you have the choice of being in "file transfer mode", where it mounts as a drive on your PC, but you can't use it, or simply to charge while you carry on reading. 
 
How would you prefer that it worked? 
			
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I would like to be able to transfer a file, and then look at it without having to disconnect.  I was trying out different reformatting options in Calibre, and it was a real pain to either have to disconnect the Boox, or to remove and then reinsert the SD card to see how it looked.