USB Stick of GoodRAM that has a capacity of 64GB. Assuming that the average size for a photo, an MP3, and a Video is 2MB, 4MB, and 500MB respectively, then this USB can store approximately up to 30,000 photos, or 15,000 MP3s, or 122 Videos.
Its interface is USB 2.0. It is an older version, compatible with almost all devices but with slower data transfer speed (480Mbit/s) compared to newer versions.