The native tool for this format. You can download 7-Zip for free. Once installed, right-click the file and select "Extract Here."
To access the contents of a .7z file, you need a compatible extraction utility. cyclone_hk.7z
The suffix _hk frequently denotes regional mirrors, community-driven localized versions, or specific dataset collections (like cybersecurity "CTF" challenge files) hosted or curated in Hong Kong. How to Open and Extract the File The native tool for this format