Extremely similar technology to the ZX Microdrive, except the Microdrive seems much more reliable. https://obsoletemedia.org/zx-microdrive/ https://obsoletemedi

Extremely similar technology to the ZX Microdrive, except the Microdrive seems much more reliable. https://obsoletemedia.org/zx-microdrive/ https://obsoletemedia.org/zx-microdrive/ I had the "QL" version mentioned on that page, which maybe explains why they worked better for me, despite their reputation. I still have a bunch in a box, and I tried to read them just a few years ago, and they all still worked! I was amazed.