Not that the need to connect an antique floppy drive to you computer happens everyday but if it does, this is just the device you will be needing.
The xu1541 is the modern way to connect cbm iec bus devices to todays USB equipped PCs and it is meant to replace the printer port solutions based on the so-called original x1541 cable. The xu1541 interface allows you e.g. to attach a VC1541 disk drive to your desktop PC as depicted below. This allows for easy transfer of disk images from and to the old units and helps you preserve your ancient data.
If your looking for a nice Commodore 64 emulator I’d recommend CCS64. I’ve had good results with that myself.
MAKE: Blog: Use a Commodore disk drive on a PC