diff --git a/getting_started/file_management.ipynb b/getting_started/03_file_management.ipynb
similarity index 100%
rename from getting_started/file_management.ipynb
rename to getting_started/03_file_management.ipynb
diff --git a/getting_started/file_management.md b/getting_started/03_file_management.md
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rename from getting_started/file_management.md
rename to getting_started/03_file_management.md
index b7b2ecd18f37c3be5380377a8cdd7f6f3bb1ce02..a3bfea0aecb50d0b225722c2bb74849447b658c0 100644
--- a/getting_started/file_management.md
+++ b/getting_started/03_file_management.md
@@ -106,11 +106,11 @@ print('Changed back to: {}'.format(cwd))
 
 For the rest of this practical, we're going to use a little data set that has
 been pre-generated, and is located in a sub-directory called
-`file_management`.
+`03_file_management`.
 
 
 ```
-os.chdir('file_management')
+os.chdir('03_file_management')
 ```
 
 
diff --git a/getting_started/file_management/.solutions/compress_all_uncompressed_images.py b/getting_started/03_file_management/.solutions/compress_all_uncompressed_images.py
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