diff --git a/Development.md b/Development.md
new file mode 100644
index 0000000..e113743
--- /dev/null
+++ b/Development.md
@@ -0,0 +1,3 @@
+# Resetting devices
+
+Tuhi stores the device data in `$HOME/.local/share/tuhi/<btaddress>` (i.e. `$XDG_DATA_HOME`) The primary file is `settings.ini` which is how Tuhi remembers devices it has already seen. Removing that device and/or the whole folder makes the device unknown again and the device has to be re-registered.
\ No newline at end of file