Sometimes, when downloading a massive bundle of fonts, you will receive a .txt file—often named links.txt or similar—instead of the font files themselves. This file acts as a manifest, containing direct download links for each font. How to Download from a links.txt File
The most popular repository for open-source fonts. Everything here is free for commercial use.
If you have a links.txt file, you can download all the links within it systematically:
Open the folder, select the font files ( .ttf or .otf ), right-click on them, and select Install or Show more options > Install .
If you have hundreds of fonts, consider using a font manager to enable/disable them, reducing startup time for design apps.