diff --git a/main.py b/main.py
index c2885b2..3df5a18 100644
--- a/main.py
+++ b/main.py
@@ -21,7 +21,7 @@ forge_libraries_dir = os.path.join(minecraft_dir, f"libraries/net/minecraftforge
 forge_libraries_url = f"https://git.jisoonet.com/publicprojects/{forge_libraries_version}/-/archive/main/{forge_libraries_version}-main.zip"
 
 # Backup folder for mods.
-mods_backup_dir = os.path.join(minecraft_dir, "mods_backup")
+mods_backup_dir = os.path.join(minecraft_dir, "mods-backup")
 
 # Modpack variables.
 default_modpack_name = "apocaz-modpack"
@@ -65,16 +65,23 @@ def install_forge(forge_dir, forge_url):
     else:
         print("Forge is already installed.")
 
+# Installs forge files and places them in the correct version folder.
+        
 
 # Backups the mods from the mods folder to the backup folder.
 def backup_mods(modpack_dir, mods_backup_dir):
     print("Backing up existing mods...")
     if Path(modpack_dir).exists():
-        if not Path(mods_backup_dir).exists():
-            os.makedirs(mods_backup_dir)
+        os.makedirs(mods_backup_dir, exist_ok=True)
         for item in os.listdir(modpack_dir):
-            shutil.move(os.path.join(modpack_dir, item), mods_backup_dir)
-        print(f"Existing mods backed up to {mods_backup_dir}")
+            source_path = os.path.join(modpack_dir, item)
+            destination_path = os.path.join(mods_backup_dir, item)
+            if not os.path.exists(destination_path):
+                shutil.move(source_path, destination_path)
+            else:
+                os.remove(source_path)
+                print(f"Duplicate found, not moving '{item}'.")
+        print(f"Mods backed up to '{mods_backup_dir}'.")
     else:
         print("No mods directory found. No backup required.")