There is an element of surprise among people that the i touch does not have a memory card nor is it possible to change the memory. I know that I was a little surprised about this also.
The itouch does not use a card and has instead an internal memory of 8, 16 or 32GB depending on the model purchased. Other brands which do have a card, have a smaller internal memory and therefore need and external memory card. The new itouch is beautiful in appearance, slim and light, and having a memory card option would make it thicker and less attractive visually.
Some users have asked if it is possible to upgrade the internal memory in some way. However this is not really possible and in anycase would nullify the guarantee.
Having researched several forums I have found that generally speaking, itouch 32GB owners are very happy with its storage capabilities and see no need for more. The itouch 32 GB, having a 15% bigger battery than previous models, is able to store about 8,000 songs, and 40,000 photos or 40 hours of video.