LG Stylo 2 Plus LG-K550 - Manual (Page 21)

Features you will love 20
Using nearby devices
You can play multimedia files saved on a connected device from your
device.
1 From the Gallery or Music app, select > Nearby devices.
2 Select a device from the device list.
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If the desired device is not seen on the device list, check that DLNA is
turned on, then tap Search nearby devices.
3 Play content saved on the selected device.