Much of my early post-college work is stored across a stack of Mac formatted Bernoulli disks. The software requires an ADB dongle to run, so physical hardware is required. I wonder if any of those ADB to USB adapters could be mapped into the emulator?
If you've not backed it up already that data might be gone. If it's valuable to you then I'd recommend finding out sooner than later
Anyone who has a working Bernoulli box probably has a matching old mac to go with it.
maybe this would work? https://www.bigmessowires.com/usb-wombat/
All of the ADB to USB adapters I know of only support mice and keyboards and have internal firmware that maps to USB HID. You'd have to write a custom firmware to make a raw pass through to an emulator...
It would probably be easier to crack the software!