diff --git a/src/main.py b/src/main.py
new file mode 100644
index 0000000..4ba9ef5
--- /dev/null
+++ b/src/main.py
@@ -0,0 +1,46 @@
+import argparse
+from pathlib import Path
+from photo import Photo
+import os
+
+
+
+def get_args():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('main', type=Path)
+    parser.add_argument('new', type=Path)
+    return parser.parse_args()
+
+
+def main(main_dir: Path, new: Path):
+    main_files = {}
+
+    generate_photo_dict(main_dir, main_files, new)
+
+
+def generate_photo_dict(path: Path, file_list: dict, exclude: Path):
+    if not path.is_dir():
+        raise Exception(f"{path} is not a directory.")
+
+    for entry in path.iterdir():
+        if entry.is_file():
+            filename = entry.name
+            if filename in file_list:
+                print(f"Duplicate photo: {filename}")
+            file_list[filename] = Photo(entry)
+        elif entry.is_dir():
+            if entry == exclude:
+                print(f"Excluding: {entry}")
+                continue
+            generate_photo_dict(entry, file_list, exclude)
+
+
+if __name__ == '__main__':
+    args = get_args()
+    main_directory = args.main
+    new_directory = args.new
+
+    if len(new_directory.parts) < 3:
+        raise Exception("Paths too short")
+
+    main(main_directory, new_directory)
diff --git a/src/photo.py b/src/photo.py
new file mode 100644
index 0000000..cbd2b60
--- /dev/null
+++ b/src/photo.py
@@ -0,0 +1,10 @@
+from pathlib import Path
+import os
+
+class Photo:
+    def __init__(self, path: Path):
+        self.path = path
+
+    @property
+    def size(self):
+        return os.path.getsize(self.path)
\ No newline at end of file