2160p50 h264 playback problem

[drhdvideo]

Dear H8 experts,

1) did someone ever try to play a UHDp50 h264 movie w/o sync sound problems after just a short time?  Source:  SSD USB2, data rate 40 Mb/s only.

A UHD movie h264 25p with 100 Mb/s runs fine, but the 50p with only 40Mbs won't. Strange.

2) any chance that it will read one day exFAT sticks and cards (and Mac HFS+ Discs) ?

Thanks a lot for your help!