diff --git a/Concepts.md b/Concepts.md
index add5a61..778be77 100644
--- a/Concepts.md
+++ b/Concepts.md
@@ -46,14 +46,21 @@ or a Bash function (with <kbd>^\\</kbd> as dvtm modifier) to handle arguments:
 
 ## Sessions
 
-Sessions are a way to save and restore states of work. A session stores the settings and contexts. All the session files are located in the `${XDG_CONFIG_HOME:-$HOME/.config}/nnn/sessions` directory by the session name.
+Sessions are a way to save and restore states of work. A session stores the settings and contexts.
 
 Sessions can be loaded dynamically at runtime or with a [program option](https://github.com/jarun/nnn/wiki/Usage#program-options).
 
 Notes:
 
-1. When a session is loaded dynamically, the last working session is saved automatically to a dedicated -- "last session" -- session file. The "last session" is also used in persistent session mode.
-2. Listing input stream has a higher priority to session options (`-s`/`-S`). Sessions can be loaded explicitly at runtime. Session option _restore_ would restore the persistent session at runtime.
+1. When a session is loaded dynamically, the last working state is saved automatically to a dedicated -- "auto session" -- session file. The "auto session" is also used in persistent session mode if no session is loaded explicitly.
+2. Listing input stream has a higher priority to session options (`-s`/`-S`). Sessions can be loaded explicitly at runtime. Session option _restore_ would restore the "auto session" at runtime.
+3. The persistent session option is global. If it is used, the last active session will be updated with the final state at program quit.
+
+All the session files are located by session name in the directory
+
+`${XDG_CONFIG_HOME:-$HOME/.config}/nnn/sessions`
+
+"@" is the "auto session" file.
 
 ## Filters