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				Upgrading internal memory
			 
 
			
			Having just now replaced a broken Touch with a "new old stock" N905B model, I opened the back of my old one and noticed that its so-called internal memory is merely a 2GB MicroSD card. Can that be swapped for a larger capacity card, and - if so - what is the maximum capacity? 
 I use an external MicroSD card but it is far less convenient, as it cannot be seen in Windows Explorer so to add more books means removing and replacing it with a consequent delay while it imports the contents.
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