Panasonic DMR-XS350

The hard disk drive (HDD) Management menu is also available no matter which
drive is currently active. The main difference in accessing the HDD
Management menu is that you must press and hold the “OK” button for 3
seconds.
Function
Menu
Page 30
Select Press Menu Display
(example)
How do I delete all videos from the hard drive?
HDD Management
Others
TV Guide
Copy
Delete
Recording
Playback
DIGA Function Menu
Setup
BD / DVD Management
Network
DV Automatic Recording
Flexible Recording via AV input
Ext Link Standby
Others
Network Settings
Connection
Display
Sound
Picture
HDD / Disc
Tuning
Setup
Continued…
Others
Setup