This file contains a group of subfiles in a BFSAR archive. When a file isn't stored in the file block of the BFSAR file or externally, the group files are scanned until it is found (or not found anywhere).
0x7800
0x7801
0x7802
This block contains the actual subfiles. All files are aligned to 32 bytes.
This block specifies which files this group depends on.