If you get a CRC error, one of your parts is bad. Don't panic; it’s usually just one, and you can re-download that specific part rather than the whole 150GB.
Here is a piece related to this topic, focusing on a scenario involving a large, multi-part download: Title: The 150GB Odyssey: Surviving the Multi-Part Archive Download 150k rar
You must have all parts in the same folder. Opening part1.rar with a tool like 7-Zip or WinRAR usually prompts it to find the others automatically. If you get a CRC error, one of your parts is bad
Downloading a 150GB+ file is rarely straightforward. It is an odyssey that tests your patience, your hard drive space, and your archival software. Opening part1
If you are tight on space, remember the golden rule: the total needed space is often double the final size. You need space for the zipped parts AND the extracted files. One savvy tip is to start extraction and, if desperate, delete the .rar parts as soon as the corresponding files are extracted, though this is risky if corruption occurs.
