Doditw3_2gb.part04.rar -

Ensure you have every part of the set (part01 through the final part).

Which of the game are you trying to install (e.g., v4.04)? DODITW3_2GB.part04.rar

DODI repacks often include a "Verify BIN files" tool; run this before installing to ensure your download isn't corrupted. Ensure you have every part of the set

The "2GB" in the name indicates each part of the download is 2GB in size. Installation Instructions DODITW3_2GB.part04.rar

The Witcher 3: Wild Hunt - Complete Edition (v4.04 Next-Gen Update) [2].