Ok I know what are Format 1 and Format 2 files. What NSK version do I need if I want support for Format 2 files?
The D46 release supports larger partitions then were previously supported. This change allows files and file partitions to increase from the format 1 size of 2 gigabytes to the format 2 size of 1 terabyte (although the upper limit of the actual file size depends upon the size of the largest single disk).