specify what is read from the directory

src/params/mod.rs

@@ -2,7 +2,8 @@ use clap::Parser;
 
 #[derive(Parser, Debug)]
 pub struct Args {
-    /// The directory to download mp3 files into
+    /// The directory to download mp3 files into.
+    /// This is also the directory where the subscription and history files are stored.
     /// Defaults to the current directory
     #[arg(short, long, default_value = ".")]
     pub directory: String,