Sony HAP-Z1ES User Manual page 123

An external hard disk drive that has been used with the
HDD AUDIO PLAYER cannot be used with your computer.
The external hard disk drive that has been formatted by the HDD AUDIO PLAYER cannot be
recognized by the computer.
If you want to use the external hard disk drive with your computer, format it on the computer.
Please note that if you format the external hard disk drive with your computer, all stored
music files will be erased.
You want to delete music files but do not know how.
You can delete music files from the HDD AUDIO PLAYER in the following ways.
Display the Options screen from the list screen or Playback screen and then select [Delete] to delete
music files.
Use the HAP Music Transfer application installed on your computer to delete music files.
The information of an external hard disk drives does not
appear on the HDD AUDIO PLAYER.
External hard disk drives with compatible file systems need to be scanned when connected
to the HDD AUDIO PLAYER for the first time. Confirm the message and then perform the
scan. If the information on the external hard disk drive does not appear even after scanning
the drive, try the following:
Select [Special Mode] - [Clear Database], and then rescan the hard disk drive.
If the problem still persists, perform [Factory Reset], and then rescan the hard disk drive. (*)
If you use a computer to add or delete music files on an external hard disk drive that was
previously connected to the HDD AUDIO PLAYER, then connect the external hard disk drive
to the HDD AUDIO PLAYER again, the information does not appear correctly. Try the
following:
Perform [Rescan External HDD (differing items)].
If rescanning for differing items is not effective, perform [Rescan External HDD].
If the above two methods do not solve the problem, select [Special Mode] - [Clear Database], and