Yes, you can use the internal memory but I would recommend a memory card. 1 GB is very little. I would strongly recommend Henkaku so that you can play any Vita/PSP/PS1 game that you want. With Henkaku the console gets very useful. System software must be no later than 3.60. Henkaku will not work on 3.61/3.63/3.65. You can not download Pulse from the store with Henkaku. You need to be on latest firmware to do that.