diff --git a/README.md b/README.md
index f757624..abd5eed 100644
--- a/README.md
+++ b/README.md
@@ -25,3 +25,21 @@ ddev start
 ddev composer update
 ddev . drush -y site:install minimal --existing-config
 ```
+
+
+## Running the migration.
+
+Put the D7 files in th following location:
+```
+<Project Root>/d7/sites/default/files/
+```
+There is a reference to the `sites/default/files` in the database so that structure is mandatory for the migration.
+The path in the `upgrade_d7_file.yml` migration file is different because this is executed inside the docker container so in the
+docker container the <Project Root> is: `/var/www/html/` but no need to re-create those folders in the host machine.
+
+Create a database called `drupal7` with the content of the old site, [check here how to create the database](https://stackoverflow.com/a/49785024/1943924)
+
+Once the files are in the correct place and the database has been created we can run the following  to run all the migrations:
+
+`ddev exec drush mim --group="migrate_drupal_7_geo"`
+