Use a USB flash drive formatted to FAT32 .
Firmware for these specific Discovery models is often hosted on community-driven satellite forums. You can look for the latest versions on sites like G-MScreen or regional satellite tech blogs like SatDL . Important Warnings Download DISCOVERY 555HD 1506t V11 27092021 rar
Copy the .bin file directly to the root directory of your USB drive (do not put it in a folder). Flash the Firmware: Insert the USB into the receiver. Go to Menu > Setting > Upgrade > USB Upgrade . Select the .bin file and press OK. Use a USB flash drive formatted to FAT32
Sunplus 1506t (a common, low-cost chipset for HD receivers) Version: V11 Release Date: September 27, 2021 (indicated by "27092021") 2021 (indicated by "27092021")