I still have some 5 1/4" floppies and I wanted to read them (if still possible at all). I still have an old drive, even an HD 1.2MB one.
However, it's literally impossible to find USB to 5 1/4" floppy interfaces now in Europe. I only found one outfit in the US that sells them, but they refused to ship to europe :(
If anyone has any tips I'd appreciate it because I'm pretty lost now.. I have much old hardware but nothing that can drive a 5 1/4" floppy drive. It's mostly unixy stuff like HP9000's and Macs.
If you get yourself a greaseweazle (or have an stm32 blue pill laying around) it will allow you to create a disk image of the disks over usb