: Right-click on the first file in the sequence ( R&G.7z.001 ) and select 7-Zip > Extract Here or Extract to "R&G" .
: Ensure all files in the sequence are present in a single directory. Use 7-Zip : Download and install the 7-Zip utility. R&G.7z.004
The file is a specific part of a multi-volume 7-Zip compressed archive. Because this is only the fourth segment (part 004) of a split archive, you cannot "put together" or open it as a standalone report. It is a raw data fragment that requires its companion parts to be functional. Required Files for Reassembly : Right-click on the first file in the sequence ( R&G