LG Network Attached Storage with built-in Blu-ray Rewriter N4B1 - Manual (Page 117)

. LG NAS web menu usage (Regular users)
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Blu-ray(CD/DVD/BD)
The built in Blu-ray Drive allows direct copy of data from discs to the LG NAS.
Furthermore, secondary backup of data using the Blu-ray drive makes data
management safer and more efficient.
Storing
Reading disc data from the Blu-ray drive is an LG NAS storage function.