diff --git a/core/buffers.py b/core/buffers.py
index 59ab4e8..dbea0c9 100644
--- a/core/buffers.py
+++ b/core/buffers.py
@@ -21,14 +21,17 @@ class Buffer:
                         instance.components.components["left"]) + len(line), " " * (instance.safe_width - len(line)))
 
     @staticmethod
-    def remove_char(string: str, index: int) -> str:
+    def remove_char(instance):
         # Remove a character from a string at a given index
-        return string[:index] + string[index + 1:]
+        instance.buffer.data[instance.cursor[0]] = instance.buffer.data[instance.cursor[0]][:(instance.cursor[1] - 1)] \
+                                                   + instance.buffer.data[instance.cursor[0]][(instance.cursor[1] - 1) + 1:]
 
     @staticmethod
-    def insert_char(string: str, index: int, char: (str, chr)) -> str:
+    def insert_char(instance, char: (str, chr)):
         # Insert a character into a string at a given index
-        return string[:index] + char + string[index:]
+        instance.buffer.data[instance.cursor[0]] = instance.buffer.data[instance.cursor[0]][:instance.cursor[1]] + \
+                                                   char + \
+                                                   instance.buffer.data[instance.cursor[0]][instance.cursor[1]:]
 
 
 def open_file(file_name):
diff --git a/core/utils.py b/core/utils.py
index 7a646f6..3134232 100644
--- a/core/utils.py
+++ b/core/utils.py
@@ -8,11 +8,6 @@ from pathlib import Path
 from core.colors import Codes as Col
 
 
-def clear(instance, y: int, x: int):
-    # Clear the line at the screen at position y, x
-    instance.screen.insstr(y, x, " " * (instance.width - x))
-
-
 def gracefully_exit():
     # Close the curses window
     curses.endwin()
@@ -21,6 +16,11 @@ def gracefully_exit():
     sys.exit()
 
 
+def clear(instance, y: int, x: int):
+    # Clear the line at the screen at position y, x
+    instance.screen.insstr(y, x, " " * (instance.width - x))
+
+
 def pause(message: str):
     # End the curses session
     curses.endwin()
@@ -29,20 +29,34 @@ def pause(message: str):
     input(f"{message}\n\n Press enter to continue...")
 
 
-def load_json(file: str) -> dict:
-    # Load the json file with read permissions
+def load_file(file: str) -> dict:
+    # load the json file with read permissions
     with open(file, "r") as f:
         return json.load(f)
 
 
+def save_file(instance, file: str, data: list):
+    # Save the data to the file
+    with open(file, "w") as f:
+        try:
+            for index, line in enumerate(data):
+                if index == len(data) - 1:
+                    f.write(line)
+                else:
+                    f.write(f"{line}\n")
+
+        except Exception:
+            error(instance, f"File {file} could not be saved.")
+
+
 def load_config() -> dict:
     # Parse the path of the config file
     config_file = f"{Path.home()}/.config/lambda/config.json"
 
     # Only if the config file exists, attempt to load it
     if os.path.exists(config_file):
-        # Return the loaded config as a dictionary
-        return load_json(config_file)
+        # Return the loaded config
+        return load_file(config_file)
 
 
 def welcome(screen):
diff --git a/main.py b/main.py
index d114803..1818697 100644
--- a/main.py
+++ b/main.py
@@ -9,10 +9,6 @@ from core.components import Components
 
 class Lambda:
     def __init__(self, buffer: Buffer = None, config: dict = None):
-        self.screen = curses.initscr()
-        self.config = config or {"icon": "λ"}
-        self.buffer = buffer or [""]
-        self.mode = "normal"
         self.cursor = [0, 0]
         self.raw_cursor = [0, 0]
         self.offset = [0, 0]
@@ -20,6 +16,10 @@ class Lambda:
         self.width = 0
         self.safe_height = 0
         self.safe_width = 0
+        self.mode = "normal"
+        self.config = config or {"icon": "λ"}
+        self.buffer = buffer or [""]
+        self.screen = curses.initscr()
         self.components = Components(self)
 
     def update_dimensions(self):
diff --git a/mode/command.py b/mode/command.py
index d19fbc0..51d28e8 100644
--- a/mode/command.py
+++ b/mode/command.py
@@ -20,7 +20,7 @@ def execute(instance, commands: list):
 
             elif command == "w":  # Write
                 # Write to the file
-                pass
+                utils.save_file(instance, instance.buffer.path, instance.buffer.data)
 
             elif command == "q":  # Quit
                 # Create a goodbye prompt
diff --git a/mode/insert.py b/mode/insert.py
index 8e009a8..0e6572b 100644
--- a/mode/insert.py
+++ b/mode/insert.py
@@ -1,11 +1,28 @@
-from core import cursors, modes
+import curses
+
+from core import cursors, modes, utils
 
 
 def execute(instance, key):
-    if key == 27:  # Enter
+    if key == 27:  # Escape
         # Switch to normal mode
         modes.activate(instance, "normal")
 
+    elif key == 127:  # Backspace
+        if instance.cursor[1] > 0:
+            # Delete the character before the cursor
+            instance.buffer.remove_char(instance)
+
+            # Move the cursor one to the left
+            cursors.push(instance, 3)
+
+    else:
+        # Insert the character
+        instance.buffer.insert_char(instance, chr(key))
+
+        # Move the cursor one to the right
+        cursors.push(instance, 1)
+
 
 def activate():
     # Switch the cursor to a line