Az26.part3.7z -

This file ( .part3 ) cannot be opened independently. It relies on az26.part1.7z and az26.part2.7z (and potentially others) to reconstruct the original data.

Do you have all the parts, and are you having trouble extracting them? If you tell me or what file type you are expecting inside , I can help you fix it.

Using 7-Zip , WinRAR, or another compatible archiver, open only the first file ( az26.part1.7z ). The software will automatically detect and extract the entire sequence from all parts into the target file.