I used Sandisk Extreme Pro 64GB UDMA7 160 MB/S CF card and Lexar 1333X 64GB XQD card.
If I used only single card either CF or XQD, the D4 will store up to 64 GB.
If I used dual slots, one is primary and other in secondary slot function - Backup, I will got an error around 20-23GB of data, "Dish...