Sony PCG-C1VPK - Manual (Page 41)

Using the Floppy Disk Drive (optional)
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Plug the USB cable from the floppy disk drive into the (USB) port on the
computer. The VAIO logo on the disk drive should be facing up.
To insert a disk
1 Hold the disk with the label side facing up.
2 Gently push the disk into the drive until it clicks into place.
Plugging in USB Cable
Inserting disk
disk
Floppy disk drive