Bvv-15_r.7z.7z.001

: The double .7z.7z suggests the file was compressed, and then the resulting archive was compressed a second time before being split.

: Right-click on the .001 file and select 7-Zip > Extract Here . BVV-15_R.7z.7z.001

: Always be cautious when opening archives from unknown sources. Ensure your antivirus is active, as multi-part archives are sometimes used to hide large executable files. : The double