Answer:
A memory stick.
Explanation:
A memory stick can be defined as a storage media device with flash memory. They are mainly used in smart or portable electronic devices such as mobile phones, digital cameras, mp3 players, camcorders, etc.
Memory sticks are usually small in size and as such are easily accessible for the transfer of digital files such as images, videos, audios from a portable device or computer to another device such as a computer.
Hence, a memory stick would be a suitable device to transfer 12 photos from one PC to another.