ObjBody body of ObjFIle header : 16+ 8 + 18 = 32 | crc [16] | objBody ..................

ObjHeader struct: one block Obj Header , can include many keys data TP [2]byte version info bodystart addr can found start, crc , will genreate a uuid to split block, to check if startaddr is ok Info can search quick , to make sure if this key in this.