This thread caused me to try a, better than stock, USB cable. It hooks between the portable HDD and Oppo BD105. I hadn’t tried any aftermarket USB cables before for various reasons. 1. Afraid to invest too much because my next HDD might use a different connector. 2. Not sure which reasonably priced cable to try. 3. There was always something else to buy.
After reading all the Supra recommendations, I went with their entry level cable. The idea of separately shielded signal and power made sense. Amazingly, the US distributor got the cable here in 3 days. The 1m Supra is an amazing improvement over the ~8" cable supplied with the drive. Problems, I thought were speaker and room related, vanished. Anyone considering a 1st time high quality USB cable should try one.
Thanks,
aldnorab