I've got a 3.5" floppy drive that I pulled out of a broken pc that's been in storage. I've seen these converter boards that plug into the back of the drive and run the power/data through usb.
This one is overpriced but it has good pictures. They seem to run $10 to 15 shipped if you can wait on a package from overseas.
https://www.newegg.com/p/0X6-04KT-0FNV7?Description=floppy%20to%20usb&cm_re=floppy_to_usb-_-0X6-04KT-0FNV7-_-Product
Anyone ever used one of these to hook up an old floppy drive?