While is not a standard system file, the .7z extension identifies it as a compressed archive created with 7-Zip . The specific filename "wxy" is often associated with custom game mods, particularly for League of Legends via the legacy Wooxy skin installer .
If this is a custom archive you are creating or examining, a for a typical .7z file would include: 1. File Metadata and Header wxy.7z
: Unlike ZIP, .7z often treats multiple files as a single continuous block, significantly improving the compression ratio for similar files (e.g., several text documents or game textures). While is not a standard system file, the
: Optional AES-256 encryption to protect the contents with a password. 2. Primary Data Blocks File Metadata and Header : Unlike ZIP,
: A map of internal folders and filenames, supporting Unicode for special characters. 3. Usage Contexts for "wxy" Files
: Most commonly LZMA or LZMA2 , which provide 30–70% better compression than standard ZIP.
: A 6-byte identifier (0x37 0x7A 0xBC 0xAF 0x27 0x1C).