: If you get an error saying "Checksum error" or "Unexpected end of archive," it usually means one of the parts didn't download correctly. You'll need to figure out which one is the wrong size and redownload it.
This file name looks like a piece of a high-definition movie download, specifically a split RAR archive for the 2006 film . elcodigodavinci2006vextm1080g36.part01.rar
: You use a program like WinRAR or 7-Zip . You only need to right-click the first file ( part01 ) and select "Extract." The software automatically pulls data from all the other parts to recreate the full 1080p video file. : If you get an error saying "Checksum
: Files shared in this multi-part format on forums or file-hosting sites are common targets for malware. If the extraction asks you to download a "codec" or run an .exe file to see the movie, it is almost certainly a virus. : You use a program like WinRAR or 7-Zip
If you are trying to handle this file, here is the "story" of how to get it working and what to watch out for: How to use these files