IPhone and iPad Memory Upgrade?

Does anyone know any way to add extra memory to an iPhone or iPad? I don't really want to have to go buy new devices just for memory.

That's the only way
Apple iPad models come with three storage options as of the iPad 2 release: 16, 32 or 64 gigabytes. Even the largest of these may seem unusually small compared to modern computer hard drive storage, where 500 GB or more is common. With a $100 price jump attached to each storage level increase as of March 2011, you may wonder whether you should opt for the full 64 GB or save few dollars on the 16 GB model and have money to pay the rent. The worth of the extra memory is completely dependent on your mobile computing needs

No way possible you set with whatever gb you bought