This indicates there are at least 19+ files (part01, part02, etc.).
Move E2GB.part19.rar and all other parts ( .part01.rar , .part02.rar , etc.) into the same folder [1]. E2GB.part19.rar
This means part 19 (or another part) is corrupted or incomplete. You will likely need to re-download that specific part [1]. This indicates there are at least 19+ files
Select or "Extract to [Folder Name]" using WinRAR or 7-Zip. You will likely need to re-download that specific part [1]
If you get a password prompt, you must obtain it from the original source where you downloaded the file. To give you more specific instructions, could you tell me: What software are you using to try and open this? Are you getting a specific error message ?
Find the file named E2GB.part01.rar (or simply E2GB.rar if the first part isn't numbered). Extract: Right-click E2GB.part01.rar .