Western Digital WD20000H2U User Manual - Page 5

MY BOOK MAC EDITION USER MANUAL 2 About Your WD Drive Drive Format This WD device is preformatted to HFS+ (Journaled) for compatibility with Macintosh operating systems. To reformat the device to Windows, visit support.wdc.com and search our knowledge base for answer ID# 1550. Important: Reformatting My Book erases all its contents. If you have already saved files on My Book, be sure to back them up before reformatting. LED Indicators The power/activity LED is located on the center, front panel of the device. The LED indicators function as follows. Power/Activity LED Appearance Steady Fast flashing (for approx. 3 seconds) Slow flashing (every 5 seconds) Alternating top and bottom Description Power-on state or power-save mode Transitioning to system standby System standby Drive in use ABOUT YOUR WD DRIVE - 3