Sony HAP-S1 User Manual page 91

The external hard disk drive is not recognized.
Some music files are not transferred.
An external hard disk drive that has been used with the HDD AUDIO PLAYER cannot be used
with your computer.
You want to delete music files but do not know how.
The information of an external hard disk drives does not appear on the HDD AUDIO PLAYER.
[Unformatted external HDD has been connected. Format the HDD?] appears when you connect
an external hard disk drive to the EXT port on the rear panel of the HDD AUDIO PLAYER.
[89] Troubleshooting
Help for HAP Music Transfer/HDD Audio Remote
Help for HAP Music Transfer or HDD Audio Remote can be displayed from the following
website.
http://rd1.sony.net/help/ha/hap1/
[90] Troubleshooting
If the problem is not solved
Using the Clear Database function or the Reset to Default Settings function (Special Mode)
Resetting to the factory default
Customer support websites
[91] Dealing with problems/Inquiries
Standby modes