A file ending in .001 is the first segment of a "split archive". Large files are often broken into smaller chunks to make them easier to download or share. To successfully extract the content, you need every single numbered part that belongs to that set. 1. Gather All Parts
Check that the filenames are identical except for the numbered extensions.
Since Windows File Explorer often fails to recognize split archives, download and install one of the following reputable tools:
To extract a .001 zip file, you must have all parts of the split archive (e.g., .001 , .002 , .003 ) in the same folder and use a third-party tool like 7-Zip or WinRAR to open only the first file. The standard Windows extractor typically cannot handle these split segments on its own.
Keka (for Mac) : A reliable choice for macOS users dealing with split files.