Sony PCG-SRX77P - Manual (Page 51)

Connecting a PC Card Bus Drive
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2 Place the disc in the tray with the label side facing up.
3 Push the disc onto the hub until the disc clicks into place.
4 Close the tray by pushing it in gently. The Busy indicator on the drive flashes
while your computer is reading data from the disc.
To remove the drive
Remove the PC Card from the computer. See “To remove the floppy disk drive
when the computer is on” for more information.
Inserting Disc
Flashing Busy Indicator
Disc
Busy indicator