: Ensure you have every part of the sequence. If the set contains five parts, you need 2E.7z.001 , 2E.7z.002 , 2E.7z.003 , 2E.7z.004 , and 2E.7z.005 .
7-Zip / Discussion / Open Discussion: Repair corrupt 7z archive 2E.7z.001
7zip file with numbers on it like 001 means that you only have a part file of the whole compressed file. Microsoft Learn : Ensure you have every part of the sequence