As a .001 file, it is incomplete on its own . You cannot extract it unless you have all subsequent parts (e.g., .002 , .003 ) in the same folder.
Since "Tc-Aran" does not correspond to a mainstream, verified software brand, ensure you trust the source. Scan the contents with updated antivirus software after extraction. Tc-Aran-002.7z.001
Files with .7z.001 extensions are common on forums or archive sites for splitting movies, TV series, or disc images into manageable chunks. As a .001 file