I have seen type I and type II memory cards on sale. I have also seen all types of memory card sizes available. I am new to the digital camera universe and need help getting the correct memory card for my camera. Thank you. Sanyo shows that their cameras (I could not find a reverence to your VPC-503) use SD/MMC cards. Just take your camera into an electronics store and have them take a look at the card that is in your camera. They will be able to show you some cards that are compatible with your camera. MAKE SURE! that you get at the very least a 1gb card. | 