We're having a problem with the folder names the NSB-25 gives the card names.
We're shooting 4K on Sony FS7 on XQD cards. The NSB-25 makes a folder for each card (for instance 20171025.000.C_999.787999), and then inside that there's a folder named for instance C_999 and inside that is the card contents. Our problem is that the NSB-25 sometimes gives the same name as a previously backed up card, so we end up with two cards (with different content) with the same name (for instance C_359). This makes the conform in Avid back to the original 4K footage a problem. Is there any way of changing how the NSB-25 names the card folder?

The "folder rename" setting is currently set to off, but as far as I can see from the manual that is only to be able to put a C1-9 in the topmost foldername.