: Keep all parts in the same folder and ensure they follow a consistent naming convention (e.g., MT5510I_PB801.part01.rar , MT5510I_PB801.part02.rar , etc.).
: Ensure you have downloaded every segment of the firmware (e.g., part01 through part06). If any part is missing, the extraction will fail with a "missing volume" error. Download MT5510I PB801 1920X1080 JVC REF30 part06 rar
Since this is a multi-part archive, you only need to interact with the first file: : Keep all parts in the same folder