: If you don't have it, get it from the official 7-Zip website .
: Select 7-Zip > Extract Here (or to a specific folder). CH.7z.004
: If the extraction fails at exactly 75% or 80%, there is a high chance that your specific CH.7z.004 file is corrupted and needs to be redownloaded. : If you don't have it, get it
: 7-Zip will automatically look for .002 , .003 , and your .004 file to pull the data together into the final original file. 3. Common Issues : 7-Zip will automatically look for
To use this file, you must have all the other parts in the same folder. Look for files named: CH.7z.001 (This is the "master" part) CH.7z.002 CH.7z.003 ...and any subsequent parts until the sequence ends. 2. How to Reassemble and Extract
: All parts must have the exact same name (except for the extension) for the software to recognize they belong together.
Knowing the source might help me give you more specific instructions on what the "CH" stands for!