We suggest trying the suggested fixes on at a time to identify and resolve the issue easily. The slow download issue can be caused by outdated network drivers, firewall blocking, caching issues, network connection issues, download server location, resource-eating programs or even download cache. Luckily, the issue can be fixed easily, which we’ll explain further in the tutorial. In many cases, the problem relies on the download server you’re connected to. Naturally, users start looking for problems in their PCs or network connection. Many gamers complain about this issue which can occur even if the Internet connection is fast.
Slow Steam download speed can be frustrating. Choose a different Steam download server location
Steam Download Slow No More: Learn why the issue occurs.