Gadget makers including Apple and Google have been accused of ripping off customers with overpriced tablet storage upgrades.Choosing between tablet models typically means deciding whether you want mobile data or not, and how much internal storage you want. However, Which? reports that consumers are getting a rough deal when it comes to paying more for higher storage capacities. See also: the 15 best tablets of 2013.For example, the entry-level iPad Air costs �399 for 16GB and you'll have to pay an extra �80 to double this to 32GB. There's no memory card slot for adding more, like many other tablets, so picking the right one is important.Which? claims that the memory upgrade only costs Apple �6 making the upgrade a mark-up of 1,2
