The error you’re encountering is likely due to the size of the files you’re trying to deploy. Netlify has certain limitations when it comes to file sizes. For instance, files over 10 MB in size are not well-supported by Netlify’s CDN. Please reference Build troubleshooting tips | Netlify Docs and your build may fail to upload to the system, causing your entire deploy to fail.
Here is some documentation about this:
Additionally, during deployment, each unzipped function bundle is limited to 250 MB in size. Some functions may exceed that limit and throw an error.
Upgrading your plan MAY not necessarily resolve this issue as these are technical limitations. Instead, you should consider hosting large content elsewhere or reducing the size of your files.
If you’re using a large number of HTML files, be aware that this can lead to long processing times. While this shouldn’t cause the deploy to fail, even a “quick” manual deploy can take quite awhile to finish if you have tens of thousands of files.