ZyXEL Communications NSA310S User Manual page 326

Chapter 18 Protecting Your Data
If you forgot the NSA password, then use the RESET button (see Section 1.1.4 on page 19) to
return the NSA to the factory default configuration.
Note: Configuration File Backup and Restoration does not affect data (your files and
folders), volumes on the NSA.
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Media Server User's Guide