Sony VAIO PCG-SR21K User Manual page 51

Connecting peripheral devices
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Connecting a USB floppy disk drive
You can connect a floppy disk drive to the USB connector on your computer.
Connecting the floppy disk drive
To connect the floppy disk drive, proceed as follows:
Plug the floppy disk drive (1) cable into the USB connector (2) identified by the symbol. The VAIO logo on
the disk drive should be facing up.