diff --git a/packages/frontend/components/Sidebar/SandboxArea.tsx b/packages/frontend/components/Sidebar/SandboxArea.tsx
index 74d0edda..9f7fdcaa 100644
--- a/packages/frontend/components/Sidebar/SandboxArea.tsx
+++ b/packages/frontend/components/Sidebar/SandboxArea.tsx
@@ -9,8 +9,8 @@ import {
 } from "@chakra-ui/react";
 import { forwardRef, useEffect, useState } from "react";
 import ResizeTextarea from "react-textarea-autosize";
+import { toast } from "react-toastify";
 
-// Still a bit buggy
 const AutoResizeTextarea = forwardRef<HTMLTextAreaElement, TextareaProps>(
   (props, ref) => {
     return (
@@ -33,28 +33,48 @@ interface SandboxAreaProps {
   planId: string | number;
 }
 
+type StoredNotes = {
+  [planId: string]: string;
+};
+
+function getStoredNotes(): StoredNotes {
+  const storedNotes = localStorage.getItem("notes");
+  if (!storedNotes) {
+    return {};
+  }
+
+  return JSON.parse(storedNotes);
+}
+
+function setStoredNotes(notes: StoredNotes) {
+  try {
+    localStorage.setItem("notes", JSON.stringify(notes));
+  } catch (e) {
+    toast.error("Maximum local storage quota exceed. Too many plans.");
+  }
+}
+
+function getPlanNote(planId: string): string {
+  const notesObject = getStoredNotes();
+  return notesObject[planId] || "";
+}
+
 export const SandboxArea: React.FC<SandboxAreaProps> = ({ planId }) => {
   const [notes, setNotes] = useState<string>("");
+
   const handleNewNotes = (e: React.ChangeEvent<HTMLTextAreaElement>) => {
     if (!planId) return;
     setNotes(e.target.value);
-    // Retrieve existing notes from localStorage
-    const storedNotes = localStorage.getItem("notes");
-    const notesObject = storedNotes ? JSON.parse(storedNotes) : {};
-    notesObject[planId] = notes;
-    // have a notes object plan_id (number | string) -> note (string)
-    localStorage.setItem("notes", JSON.stringify(notesObject));
-    //console.log("New notes: ", e.target.value);
+    const notesObj = getStoredNotes();
+    notesObj[planId] = e.target.value;
+    setStoredNotes(notesObj);
   };
 
   useEffect(() => {
     if (!planId) return;
-    const storedNotes = localStorage.getItem("notes");
-    const notesObject = storedNotes ? JSON.parse(storedNotes) : {};
-    if (storedNotes) {
-      setNotes(notesObject[planId]);
-    }
+    setNotes(getPlanNote(String(planId)));
   }, [planId]);
+
   return (
     <Box backgroundColor="white" pt="6" pb="6" px="3">
       <VStack align="left" px="4">