I think the suggestion of Akinsanola is the simplest way to download the data. Using the Shell terminal will easily help you that. Just copy the address links to the files and write a simple bash or your convenient shell script using either "wget", "curl" or "axel" that I prefer because it is fast.
following Muhammad Noor question, I have tried using wget on Windows O.S instead of Linux to download the GPM IMERGE data from the GES DISC (Nasa), I keep getting the error "unable to establish SSL" Does anyone know how I can resolve this??