This is likely a multi-part archive (part01, part02, etc.). You will need all parts located in the same folder to extract the files successfully using software like WinRAR or 7-Zip.
To help you find the exact file you need, could you tell me: Download RT2984T PC821 1920x1080 part02 rar
did you see this file name mentioned (a forum post, a specific website)? This is likely a multi-part archive (part01, part02, etc
Files of this type (e.g., .rar , RT2984T ) are common in Remont-aud.net or Badcaps.net forums for TV/monitor mainboard firmware. Download RT2984T PC821 1920x1080 part02 rar
Always scan downloaded .rar files with reputable antivirus software before extraction.
If you provide this info, I can help you find the correct, safe source.