diff --git a/README.md b/README.md
index d0cc7ad80b9bc98e8523ce380f16bbd169bd5fd2..990397da0fe9a1236cfca254bd8855037f01beec 100644
--- a/README.md
+++ b/README.md
@@ -13,11 +13,6 @@ Packaging informations :
 - https://packaging.python.org/en/latest/tutorials/packaging-projects/
 - https://choosealicense.com/
 
-## Remark
-
-The data files do not need to be packaged, just place them where the data
-folder is installed.
-
 ## Build and install the package
 
 ```shell
@@ -74,6 +69,28 @@ Out[4]:
   'Study type': 'Observational'},
 ```
 
+## Remark
+
+The data files do not need to be packaged, just place them where the data
+folder is installed.
+
+WARNING : you have to manually remove the data files copied in the data folder
+installed in `site-packages` with pip if you want to remove the package.
+
+```shell
+$ pip uninstall import_resources_example
+Found existing installation: import_resources_example 0.0.1
+Uninstalling import_resources_example-0.0.1:
+  Would remove:
+    /home/fconil/Progs/python/imports/resources/.venv/lib/python3.10/site-packages/import_resources_example-0.0.1.dist-info/*
+    /home/fconil/Progs/python/imports/resources/.venv/lib/python3.10/site-packages/import_resources_example/*
+  Would not remove (might be manually added):
+    /home/fconil/Progs/python/imports/resources/.venv/lib/python3.10/site-packages/import_resources_example/data/COVID19-web.27-07-2022.csv
+    /home/fconil/Progs/python/imports/resources/.venv/lib/python3.10/site-packages/import_resources_example/data/WPP2022_TotalPopulationBySex.csv
+Proceed (Y/n)? y
+  Successfully uninstalled import_resources_example-0.0.1
+```
+
 ## Troubleshooting
 
 If we have untracked data files in the package tree, flist refuses to build the
@@ -103,4 +120,3 @@ As we can append the data files with `-f`, I will ignore the data file in `.giti
 $ git add -f WPP2022_TotalPopulationBySex.csv 
 $
 ```
-