I once mentioned to the kids I was teaching how useful I found having CD-ROMs to store stuff on. “What?!”, they said. “You had CDs back then?”
Young people always seem to have a working assumption in life that the technology they use only came into existence when they did. Anything else is ancient history. With that in mind, perhaps your pupils will find the infographic below useful and interesting. It charts the development of data storage and recovery from the time of Babbage, in 1834. Along the way there are interesting articles, photos and videos.