diff --git a/apps/choozi/app.js b/apps/choozi/app.js
index 725c4969a..9842c8d5a 100644
--- a/apps/choozi/app.js
+++ b/apps/choozi/app.js
@@ -144,21 +144,18 @@ function setN(n) {
   drawPerimeter();
 }
 
-// save N to choozi.txt
+// save N to choozi.save
 function writeN() {
-  var file = require("Storage").open("choozi.txt","w");
-  file.write(N);
+  require("Storage").write("choozi.save","" + N);
 }
 
-// load N from choozi.txt
+// load N from choozi.save
 function readN() {
-  var file = require("Storage").open("choozi.txt","r");
-  var n = file.readLine();
+  var n = require("Storage").read("choozi.save");
   if (n !== undefined) setN(parseInt(n));
   else setN(defaultN);
 }
 
-
 if (process.env.HWVERSION == 1){
   colours=colours.concat(colours2);
   shuffle(colours);
diff --git a/apps/choozi/metadata.json b/apps/choozi/metadata.json
index f0d309560..d997534e8 100644
--- a/apps/choozi/metadata.json
+++ b/apps/choozi/metadata.json
@@ -12,5 +12,8 @@
   "storage": [
     {"name":"choozi.app.js","url":"app.js"},
     {"name":"choozi.img","url":"app-icon.js","evaluate":true}
+  ],
+  "data": [
+    {"name":"choozi.save"}
   ]
 }