Hard drives don't go anywhere close, but SSD do. What is important to understand is that 25 Gbps Internet does not mean you copy from a server on Internet to your local SSD at that speed, that 25 Gbps is just the connection between your router and the ISP. On your side you may have multiple computers, on the ISP there are multiple peerings with other networks, you may reach and aggregate bandwidth of 25 Gbps but not really a point to point one, so your SSD performance is not the top factor.