Hi Altamash Ahmed,
Thank you for reaching out to us on Microsoft Q&A forum.
For each module, we provide exercise units tailored to the topic. These exercise units are complemented by labs, where you can apply what you've learned in a practical setting.
In the lab section, you'll find detailed instructions guiding you through the tasks. Everything is clearly outlined, including where to download necessary files and what actions to perform to complete the module successfully.
Learn path unit 8: https://learn.microsoft.com/en-us/training/modules/design-model-power-bi/8-lab
Step 1: Launch the lab as per below screenshot.
Before you start the lab click the downloaded lab files to D-drive as highlighted in below screenshot.
Step 2: Click the downloaded lab files to D-drive as highlighted in below screenshots.
If you are still facing any issue, please let us know in the comments. We are glad to help you.
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Thank you.