I used audio cassette for a few years (1978-1979) on my home-built Z-80 system.
Upgraded to a wacky cassette transport called a Phi-Deck. It was faster and had automated head control and seek; you could do a real file system on it. 9600 baud equivalent, for the setup I used; could get 100K or so on a cassette if you were patient.
Upgraded to a wacky cassette transport called a Phi-Deck. It was faster and had automated head control and seek; you could do a real file system on it. 9600 baud equivalent, for the setup I used; could get 100K or so on a cassette if you were patient.
https://bytecollector.com/dg_phideck.htm