: The .7z extension indicates the file uses the 7-Zip open-source format, known for high compression ratios using the LZMA algorithm.
: Use The Unarchiver or the built-in Archive Utility to process the split volumes. ALW.7z.009
: The .009 suffix identifies this as the ninth part of a larger set. To successfully extract the data, you generally must have all parts (from .001 to the final volume) in the same folder. ALW.7z.009