diff --git a/conf/config.php b/conf/config.php
index 03b79e6..5b47aa4 100644
--- a/conf/config.php
+++ b/conf/config.php
@@ -7,7 +7,7 @@
 /*******************************************************************/
 
 // Data folder (must be writeable by the web server user and absolute)
-define('DATA_DIR', __DIR__.DIRECTORY_SEPARATOR.'data');
+define('DATA_DIR', '__DATA_DIR__/');
 
 // Enable/Disable debug
 define('DEBUG', false);
@@ -16,10 +16,10 @@ define('DEBUG', false);
 define('LOG_DRIVER', 'system');
 
 // Log filename if the log driver is "file"
-define('LOG_FILE', DATA_DIR.DIRECTORY_SEPARATOR.'debug.log');
+define('LOG_FILE',  '__DATA_DIR__/debug.log');
 
 // Plugins directory
-define('PLUGINS_DIR', __DIR__.DIRECTORY_SEPARATOR.'plugins');
+define('PLUGINS_DIR', '__INSTALL_DIR__/plugins');
 
 // Plugins directory URL
 define('PLUGIN_API_URL', 'https://kanboard.org/plugins.json');
@@ -33,10 +33,10 @@ define('PLUGIN_INSTALLER', true);
 define('CACHE_DRIVER', 'memory');
 
 // Cache folder to use if cache driver is "file" (must be writeable by the web server user)
-define('CACHE_DIR', DATA_DIR.DIRECTORY_SEPARATOR.'cache');
+define('CACHE_DIR', '__DATA_DIR__/cache');
 
 // Folder for uploaded files (must be writeable by the web server user)
-define('FILES_DIR', DATA_DIR.DIRECTORY_SEPARATOR.'files');
+define('FILES_DIR', '__DATA_DIR__/files');
 
 // Enable/disable email configuration from the user interface
 define('MAIL_CONFIGURATION', true);
diff --git a/conf/nginx.conf b/conf/nginx.conf
index 9bfe759..f95318a 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -13,11 +13,6 @@ location __PATH__/ {
   location __PATH__/(?:kanboard|config.php|config.default.php) {
     deny all;
   }
-  
-  # Deny access to the directory data
-  location __PATH__/data {
-    deny all;
-  }
 
   try_files $uri $uri/ __PATH__/index.php;
   location ~ [^/]\.php(/|$) {
diff --git a/manifest.toml b/manifest.toml
index 86f4b30..4bf86bc 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -59,6 +59,9 @@ ram.runtime = "50M"
     
     [resources.install_dir]
 
+    [resources.data_dir]
+    subdirs = ["cache", "files"]
+
     [resources.permissions]
     main.url = "/"
     ics.url = "/?controller=ICalendarController"
diff --git a/scripts/backup b/scripts/backup
index 8f2ab35..b3bf5a5 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -21,6 +21,13 @@ ynh_print_info --message="Declaring files to be backed up..."
 
 ynh_backup --src_path="$install_dir"
 
+#=================================================
+# BACKUP THE DATA DIR
+#=================================================
+
+# Only relevant if there is a "data_dir" resource for this app
+ynh_backup --src_path="$data_dir" --is_big
+
 #=================================================
 # BACKUP THE NGINX CONFIGURATION
 #=================================================
diff --git a/scripts/install b/scripts/install
index 9bc25ac..44985a7 100644
--- a/scripts/install
+++ b/scripts/install
@@ -35,7 +35,7 @@ ynh_setup_source --dest_dir="$install_dir"
 
 mkdir -p $install_dir/sessions/
 
-chown -R $app $install_dir/{data,plugins,sessions}
+chown -R $app $install_dir/{plugins,sessions}
 chmod -R 700 $install_dir/sessions
 chmod -R o-rwx "$install_dir"
 chown -R $app:www-data "$install_dir"
diff --git a/scripts/restore b/scripts/restore
index a54ac47..6a33e34 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -24,6 +24,16 @@ chmod -R 700 $install_dir/sessions
 chmod -R o-rwx "$install_dir"
 chown -R $app:www-data "$install_dir"
 
+#=================================================
+# RESTORE THE DATA DIRECTORY
+#=================================================
+ynh_script_progression --message="Restoring the data directory..." --weight=1
+
+ynh_restore_file --origin_path="$data_dir" --not_mandatory
+
+# (Same as for install dir)
+chown -R $app:www-data "$data_dir"
+
 #=================================================
 # RESTORE THE MYSQL DATABASE
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 7fde12f..406d11f 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -49,12 +49,12 @@ then
 	ynh_script_progression --message="Upgrading source files..." --weight=3
 
 	# Download, check integrity, uncompress and patch the source from app.src
-	ynh_setup_source --dest_dir="$install_dir" --keep="data/ config.php"
+	ynh_setup_source --dest_dir="$install_dir" --keep="config.php"
 fi
 
 mkdir -p $install_dir/sessions/
 
-chown -R $app $install_dir/{data,plugins,sessions}
+chown -R $app $install_dir/{plugins,sessions}
 chmod -R 700 $install_dir/sessions
 chmod -R o-rwx "$install_dir"
 chown -R $app:www-data "$install_dir"
@@ -77,6 +77,17 @@ ynh_add_config --template="../conf/cron" --destination="/etc/cron.d/$app"
 chown root: "/etc/cron.d/$app"
 chmod 644 "/etc/cron.d/$app"
 
+#=================================================
+# ADD A CONFIGURATION
+#=================================================
+ynh_script_progression --message="Adding a configuration file..." --weight=1
+
+dir="__DIR__"
+ynh_add_config --template="../conf/config.php" --destination="$install_dir/config.php"
+
+chmod 400 "$install_dir/config.php"
+chown $app "$install_dir/config.php"
+
 #=================================================
 # SPECIFIC UPGRADE
 #=================================================
@@ -87,8 +98,6 @@ ynh_script_progression --message="Upgrading the app..." --weight=2
 pushd $install_dir
 	# Launch database migration
 	php$phpversion cli db:migrate --no-interaction --verbose
-	# Launch plugins migration
-	#php$phpversion cli plugin:upgrade --no-interaction --verbose
 popd
 
 #=================================================