This is a RAR archive file. You will need software such as WinRAR or 7-Zip to extract the contents [1]. Common Contexts: Such files are frequently used for:
Compressed backups of project folders, coding projects, or databases. GB01Fri rar
Look for documents ( .txt , .pdf , .docx ) within the archive that provide a manifest or readme file explaining what "GB01Fri" represents. This is a RAR archive file
Use a file archiver tool to check the contents of GB01Fri.rar . GB01Fri rar