Toshiba Satellite P20-8PW User Manual page 34

Finding Your Way Around
MAIN HARD DRIVE MODULE BAY
SD CARD WIRELESS
COMMUNICATION
The Main Hard Drive LED indicates that the HDD is being accessed.
Every time your computer runs a program, opens a file, or performs some
other function in which it must access the HDD, this light goes on.
nd
The Module Bay LED indicates that the device in either the Main or 2
Module Bay is being accessed.
The SD Card LED indicates the computer is accessing data from an SD
Card.
The Wireless Communication LED indicates the wireless LAN or
Bluetooth feature is active and that you may connect to a Local Area
Network.
Not all models come fitted with a wireless communication or Blutetooth
device
User's Manual 1-4