This question was originally posted on Gaming Stack Exchange.
I have a small collection of 5 1/4" floppy disks (early Sierra games) that I am trying to read. How can I connect a drive that accepts these disks to my PC.
A company called Device Side Data produces a device called the FC5025 which can adapt a 5 1/4" drive to a USB port. You will still need to power the drive so this approach will require either an external power source or a tower or desktop computer. There are also other limitations to this device, such as the inability to write to the disks or to read most forms of copy protection (back when these drives were common there was a technique to protect their contents form copying by writing intentionally bad data).
Using just original hardware the best approach would be to build or buy a computer that had a 5 1/4" inch drive and could connect to a network or had a 3 1/2" drive as well. 3 1/2" drives are still common enough to find as USB external drives, while networking a old PC would be complex.