Look for files named README.txt , README.md , Instructions.pdf , or similar. This is where the creator usually explains what the files are for.
Once extracted, you will likely find a folder containing several files. BD-Y-SB-2-3x.7z
Likely identifiers for specific modules, versions, or user initials. 2-3x: Often indicates a version number ( ) or a version range. 2. How to Open the File Look for files named README
This indicates a 7-Zip compressed archive , which allows for high compression ratios, similar to a .zip file but often smaller. Name Breakdown (Inferred): Look for files named README.txt