The particular Hindi Ramayana e-Book in PDF format for free download is provided by Ved Puran website. The Ramayan Hindi pdf file is nearly 182 MB. It is a single file. Most of the minor stories are also part of the book. The book is a digital version of the Ramayana published in 1927.
The link opens to a pdf file. It might take several minutes or hours depending on your net connect speed to open the file.
The file is hosted by the Vedpuran website.