diff --git a/_episodes/16-file-formats.md b/_episodes/16-file-formats.md
index b3b266c2..2a51cf4c 100644
--- a/_episodes/16-file-formats.md
+++ b/_episodes/16-file-formats.md
@@ -46,6 +46,15 @@ parameterization.
 ~~~
 {: .source}
 
+___Note:___ To follow the example below, you need to download the example input file, *file-formats.bam*. The file is available from [https://github.com/common-workflow-language/user_guide/raw/gh-pages/_includes/cwl/file-formats.bam
+](https://github.com/common-workflow-language/user_guide/raw/gh-pages/_includes/cwl/file-formats.bam) and can be downloaded e.g. via `wget`:
+
+~~~
+wget https://github.com/common-workflow-language/user_guide/raw/gh-pages/_includes/cwl/file-formats.bam
+~~~
+{: .source}
+
+
 Now invoke `cwl-runner` with the tool wrapper and the input object on the
 command line: