I got this failure when inserting a card with files with too long filenames. Despite that I cannot believe that there are limitations in filename length, even if the fat32- or exfat-filesystem support long filenames, I would like to know, what the maximum filelength support of the ND 2901 is. This limitation is quite annoying, cuz I want to store files not only from my camera... I hope you fix this in a soon updated firmware.
I got the device delivered with firmware 1.06 and the sdcard with large filenames got recognized. But after updating to the latest firmware version 1.50 from this site, I get the failure described above.
Answer by NextoDI2016-02-22
Many users request us to functionally to upward "Update Copy"
for this, we had to make a limitation of file name length to support both FAT32 and exFAT file system.
from v1.50, the maximum file length is limited 52 characters.