doc: settings: Add storage location section
Add section documenting how the settings storage location is selected
by different backends.
Signed-off-by: Alexander Mihajlovic <a@abxy.se>
diff --git a/doc/reference/settings/index.rst b/doc/reference/settings/index.rst
index 7b3e8a3..a6f9e9d 100644
--- a/doc/reference/settings/index.rst
+++ b/doc/reference/settings/index.rst
@@ -102,6 +102,17 @@
``settings_nvs_src()``, and write target by using
``settings_nvs_dst()``.
+Storage Location
+****************
+
+The FCB and non-volatile storage (NVS) backends both look for a fixed
+partition with label "storage" by default. A different partition can be
+selected by setting the ``zephyr,settings-partition`` property of the
+chosen node in the devicetree.
+
+The file path used by the file system backend to store settings
+is selected via the option ``CONFIG_SETTINGS_FS_FILE``.
+
Loading data from persisted storage
***********************************
