Sneakernet
Sneakernet in informatics is an informal and ironical word for tranport of electronical information over physical memory devices (such as USB flash drive) instead of computer networks.
The word is a word play, as a net(work) with reference to wearing of sneakers, which is a type of shoes.
Sneakernet Media
Memory cards are a popular physical medium for transferring files and have become smaller in size as technology has advanced.
Compact cassettes were a natural way of transferring data between ZX Spectrum systems in the 1980s and 1990s.