diff --git a/episodes/03-create.md b/episodes/03-create.md
index ac0eb0864..1c90c035a 100644
--- a/episodes/03-create.md
+++ b/episodes/03-create.md
@@ -148,6 +148,12 @@ expected and can even result in data loss.
 If you need to refer to names of files or directories that have spaces
 or other special characters, you should surround the name in quotes (`""`).
 
+Whether or not your Bash shell is case-sensitive is normally determined by the underlying operating system. In most implementations of Bash it is case sensitive. On MacOS, however, it is not case sensitive.
+
+It can be a good practice to use all lowercase for files and directories, but this is not a rule; you are likely to see uppercase used in practice. This effect is negligible if the letter isn't the first letter in the name, so it's not an issue if you use naming standards such as camelCase.
+
+
+
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 ### Create a text file