Use a high-quality USB stick formatted to FAT32 .
This is the eighth segment of the compressed firmware archive. You must download all parts (e.g., part01 through part08) before you can successfully extract the final .bin or .img file needed for the update. Download CV338H A50 1920x1080 EMMC Starsat part08 rar
Place the firmware file (often named allupgrade_338h_a50_sos.bin or similar) in the root directory of the USB. Use a high-quality USB stick formatted to FAT32