Structure of Filenames: HWID_PKHASH[:8]_FHPRG.bin

Examples for Oppo/Oneplus devices:
3006000000010000_82446e2f29ccb297_FHPRG.bin
009900E100000000_3be970a8579cac80_FHPRG.bin
0090B0E100000000_21c7e25a60effa6e_FHPRG.bin
0006B0E100000000_77a22b92a1bcd0c4_FHPRG.bin
000460E100000000_90864ecb91f86a1c_FHPRG.bin