Its time for new SD cards. If i am reading things correctly, the D850 can only write at 155 Mb/s. The price difference between a 256gb SanDisk Extreme with a write speed of 170 MB/s (UHS-I) and with a write speed of 300 MB/s (UHS-II) is about $260 each.
Is there any good reason to spend the extra $500? It seems that he D8050 write speed is the limitation such that he buffer capacity/write speed will be almost the same unless I'm missing something?