Sony VGC-RT100Y - Manual (Page 151)

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Upgrading Your VAIO Computer
7 Put a fingertip underneath the side flap (4) of the drive holder, lift up the holder with the current hard disk drive, and
diagonally take it out of the hard disk bay.
8 Disconnect the Serial ATA power cable and the Serial ATA cable from the hard disk drive.
9 Remove the six screws from the drive holder and take out the hard disk drive.