Corrupted cache or cookies can interfere with how Chrome manages file transfers. Often 0 KB/s download speeds? - Google Chrome Community

: Instead of clicking the download button, right-click the link and select Save link as... to specify a fresh download path. 2. Enable Experimental "Parallel Downloading"

Before diving into advanced settings, try these immediate fixes:

Here is a comprehensive guide to troubleshooting and fixing the "0 bytes" download error on Windows, Mac, and Android.