.SFA files ?

err can anyone explain to me what's an SFA file and how do i upload it using a2uploader.
i currently have;
W910_R1FA035_MAIN_GENERIC_SH_RED52.mbn
W910_R1FA035_FS_APAC-ANZ_RED52.fbn
W910i_1201-611A_R11A_GENERIC_APAC-ANZ.zip

i know how to flash the firmwares but im not sure about the SFA. do i need to extract it and upload the .sfa file alone or with the .rar itself? i've made my own custom file (W910i_1201-611A_R11A_GENERIC_APAC-ANZ) and upload using a2uploader using the misc files option.

W910_R1FA035_SFA_APAC-ANZ_RED52.rar

plz help me from where did u get fbn file
i have the sfa file if u want plz reply me or mail ne aps.sian@gmail.com
i also have the same fone