The phrase "unabridged version" refers to a complete and unchanged version of a writing or a book, with nothing taken out or shortened. It means that you are getting the entire content, including all the details and information. Full definition
With 17 of 22 starters back, it is an almost unabridged version of last season's Hurricanes, who finished 8 -2-1, ranked ninth in the country and beat VPI in the Liberty Bowl. (si.com)
(Quotation from unabridged version, available from author, Northland College, Ashland, WI) (hoagiesgifted.org)
It can be helpful if you are downloading something like 20 hours unabridged version of Tom Clancy's «Dead or Alive» audiobook. (ereadertech.com)