"128 KB" refers to a unit of digital information storage, specifically 128 kilobytes. A kilobyte is equal to 1,024 bytes, so 128 KB is 131,072 bytes. This amount of data can store simple text files, small images, or a few seconds of audio, but it is relatively small by today's standards. In the context of computer memory, 128 KB was commonly used in early personal computers and devices. For example, some early video game consoles and handheld devices operated with memory capacities around this size, which limited the complexity of the software and graphics they could handle.