Sanyo Incognito supports Micro SD card (TransFlash)to upgrade the memory. The maximum memory supports up to 16 GB.So, what you need to do is to insert a piece of Micro SD into the slot and everything would be done. As regard Micro SD card, you can search on a comparison site to find the right one. As you can compare prices, check products and read reviews on comparison sites, it's really helpful for finding what you need online.
Comparison site for famous brands,http://www.nextag.com/ »
For bargain and deal,http://www.shopsimple.com »
Of course there are other sites work pretty as well, I just list what I use a lot.