It may be a sample pack or "drum kit" used in digital audio workstations (DAWs) like FL Studio or Ableton. "Toxin" is a common stylized name for sound design libraries.
Use a free tool like the 7-Zip Official Client or WinZip to open the archive. drumstoxin.7z
Based on the file extension , this is a compressed archive created with 7-Zip or similar open-source compression software. Likely Origins of the File It may be a sample pack or "drum
Smaller creators often use .7z archives to share bulk files (like art assets or presets) because they offer a higher compression ratio than standard .zip files. How to Review or Inspect It which typically contains the creator's name
Look for a README.txt or info.nfo file inside, which typically contains the creator's name, version details, and intended use.