its because files are downloading with garbage extra in their names. for example its ADA5.7z-SY00FtdT.7z.001 and ADA5.7z-3AaOeytQ.7z.002 so it cant find the 2nd part. just remove the stuff after the - so both names are the same such as ADA5.7z.001 and ADA5.7z.002 then it will extract properly