What if there is only a small card? Does it come with the camera or does it have to be purchased?

This small card is also called a memory card (SD card memory card), and most devices need to be purchased by yourself.

SD card memory card is an independent storage medium used on mobile phones, digital cameras, portable computers, MP3 and other digital products. It is generally in the form of a card, so it is collectively called "memory card", also known as For "digital memory card", "digital memory card", "storage card", etc. Memory cards have the advantages of small size, easy portability and simple use. At the same time, since most memory cards have good compatibility, it is easy to exchange data between different digital products. In recent years, with the continuous development of digital products, the storage capacity of memory cards has been continuously improved, and their applications have become rapidly popular.