How Can I Fix Issues Extracting Split .tar Files?

The errors you're seeing point to potential file corruption, especially considering that "I/O device error." It's often associated with a failing hard drive. While it's great that you're using WinRAR and 7-Zip, they usually detect split files automatically. However, it might be worth trying the command prompt method to join the files, as mentioned before, just to see if it’s a software issue.

If this course is available for download again, maybe consider redownloading it to check for corruption. I'm also willing to lend you some space to see if I can help you repack the files if you'd like!

Typically, to extract split .tar files, you need to first combine them back into a single file. Use the copy command in Windows: `copy /b "AppliedAI Machine Learning Online Course.tar.001" + "...next files here..." "AppliedAI Machine Learning Online Course.tar"`. Once you've done that, extraction should work unless there's corruption.
Make sure your temporary extraction location has enough space and isn't prone to errors. Fingers crossed, a clean copy could do the trick if these parts turn out problematic!

First off, check if your drive is formatted as FAT32. That format can't handle files larger than 4GB, which would cause issues when joining or extracting. Make sure your drive is NTFS or exFAT.
Also, the "I/O device error" suggests there could be hardware issues with your drive. Try running "chkdsk /f" to check for errors. If your drive is failing, no amount of re-downloading will help.

Instead of using a joining tool, you can use the command prompt to concatenate the files: `copy /b "AppliedAI Machine Learning Online Course.tar.001" + "AppliedAI Machine Learning Online Course.tar.002" + ... "FullCourse.tar"`. Then try extracting that file. Also, ensure you have enough space on your C: drive for any temporary extraction files. If it still doesn’t work, one of the parts might be corrupted from the source. You should verify the checksums if available.