downgrading the firmware appears to have restored the media server. Now running Firmware Version:0.1.0 0.9.1 v0057.0 Build 160217 Rel.53237n Hardware Version:Archer VR600 v1 00000000 and is OK

if no one knows the answer in this forum, perhaps someone could suggest another place I can ask?

Model : Hardware Version : Firmware Version : ISP : Firmware Version:0.2.0 0.9.1 v0057.0 Build 160614 Rel.41735n Hardware Version:Archer VR600 v1 00000000 I've added a USB disk drive and can share it...