I wonder how to calculate the long file name checksum byte that verify if
the 8.3 filename is valid ?
According to PC Magzine June 25 1996 - How Windows 95 Stores Long
Flenames by Jeff Prosise
"The LFN directory entry's checksum byte holds an eight-bit checksum value computed by adding certain fields of the 8.3 directory entry and performing a modulo 256 operation on the result. Windows 95 uses this checksum to detect orphaned or corrupted LFN directory entries."