Always right-click on Part 1 (or the base file if it's not numbered) and select "Extract Here" or "Extract to..." .
for each piece (e.g., 100 MB or 1 GB ).
To help you make a piece (segment) of a RAR file or extract a piece from one, 🛠️ Creating a Split RAR (Breaking a File into Pieces)
If this query is referring to a hyper-specific online forum topic, or a video game mod archive labeled 21408.rar , could you provide it came from? This will allow for a more specific set of instructions! How to split rar files into parts