1. On your computer, open Chrome.
  2. At the top right, click More More and then Settings.
  3. At the bottom, click Advanced and then Downloads.
  4. Adjust your download settings:
    1. To change the default download location, click Change and select where you'd like your files to be saved.
    2. If you'd rather choose a specific location for each download, check the box next to "Ask where to save each file before downloading."


Sourced from: https://support.google.com/chrome/answer/95759?hl=en&co=GENIE.Platform%3DDesktop