Hello from Brazil. My 65" QLED Samsung Q80R is doing the same and Samsung Concierge just couldn't help me with it. Sending the whole tv to the warranty just because of this would be so weird and difficult! I've tried to reset the tv, reset the smarthub, upgrade the tv, tried different models e formats of USB and HDD and... nothing... just the "loading spinning wheel of death" logo... BTW: my TV is just one month old. Samsung never more!
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