Head on over to the Amazon product page for the Kindle Paperwhite and you may spot the message telling you that there's a newer version of the glow-in-the-dark e-reader available. That's because the retailer has quietly doubled the internal storage of the device from 2GB on the 2013 model to 4GB on this year's edition. In a statement to our friends over at The Digital Reader, the bookseller admitted that the storage had increased, but that it doesn't consider this new Paperwhite to be a new product. So, if you were finding that 2GB simply wasn't enough to hold your enormous e-book collection, you know where to go.