updates to auto download suggestion

Author: rswamina

setup.md

@@ -233,21 +233,25 @@ Please skip this section if you are not going to use ESMValTool on your
 local machine and go [here](#github-account-advanced).
 
 If you are planning on running ESMValTool on your own machine, please make sure
-that you are able to download CMIP data and that you have several GB of space
+that you are able to download CMIP data and that you have a few GB of space
 available to install conda and ESMValTool, but also enough to make a copy of some
-data (~125MB).
+data (~125MB) needed for this tutorial.
 
-To download the data required by this tutorial, run the following command using
+You can use ESMValTool to automatically download data needed for test recipes. 
+Please see the [Configuration][lesson-configuration] episode 
+or the [configuration file documentation][config-file] for more information.
+This the recommended option as it has the advantage that data is 
+stored in subdirectories, and features  such as wildcards and recording 
+the version of the data will work automatically.
+
+Alternatively, you can run the following command using
 [wget](https://en.wikipedia.org/wiki/Wget):
 
 ~~~shell
 wget --no-clobber --input-file \
   https://github.com/ESMValGroup/ESMValTool_Tutorial/raw/main/data/dataset.urls \
   --directory-prefix $HOME/esmvaltool_tutorial/data/
 ~~~
-You can also use ESMValTool to automatically download data needed for test recipes. 
-Please see the [Configuration][lesson-configuration] episode 
-or the [configuration file documentation][config-file] for more information.
 
 
 ## GitHub account (Advanced)