: You must have every preceding file in the sequence (part01, part02, ... up to part19 and any subsequent parts) saved in the same folder.
In technical terms, this is a . To "put together" the contents, you need to follow these steps: 2GB.part19.rar
: Open only the first file ( part01.rar ) using a program like WinRAR , 7-Zip , or The Unarchiver . : You must have every preceding file in