diff --git a/README.md b/README.md
index e296a13..1abf7a8 100644
--- a/README.md
+++ b/README.md
@@ -57,6 +57,8 @@ python twinTrim.py <directory> [OPTIONS]
 - `--max-size`: Specify the maximum file size to include in the scan (e.g., `1gb`).
 - `--file-type`: Specify the file type to include (e.g., `.txt`, `.jpg`).
 - `--exclude`: Exclude specific files by name.
+- `--label-color`: Set the font color of the output label of the progress bar.
+- `--bar-color`: Set the color of the progress bar.
 
 ### Examples
 
diff --git a/tests/fileFilter.py b/tests/fileFilter.py
deleted file mode 100644
index 47d2d1b..0000000
--- a/tests/fileFilter.py
+++ /dev/null
@@ -1,42 +0,0 @@
-import pytest
-from twinTrim.dataStructures.fileFilter import FileFilter
-
-def test_set_max_file_size_valid():
-    """Test setting valid max file size values."""
-    file_filter = FileFilter()
-
-    # Test with a smaller size
-    file_filter.setMaxFileSize("500mb")
-    assert file_filter.maxFileSize == "500mb", "Failed to set max file size to 500mb"
-
-    # Test with a larger size
-    file_filter.setMaxFileSize("2gb")
-    assert file_filter.maxFileSize == "2gb", "Failed to set max file size to 2gb"
-
-    # Test with a minimum size (edge case)
-    file_filter.setMaxFileSize("1kb")
-    assert file_filter.maxFileSize == "1kb", "Failed to set max file size to 1kb"
-
-def test_set_max_file_size_same_value():
-    """Test setting the same max file size."""
-    file_filter = FileFilter()
-
-    # Test setting the max file size to the default value
-    file_filter.setMaxFileSize("1gb")
-    assert file_filter.maxFileSize == "1gb", "Failed to set max file size to 1gb"
-
-def test_set_max_file_size_boundary():
-    """Test boundary values for max file size."""
-    file_filter = FileFilter()
-
-    # Test setting a value just under the default
-    file_filter.setMaxFileSize("999mb")
-    assert file_filter.maxFileSize == "999mb", "Failed to set max file size to 999mb"
-
-def test_set_max_file_size_empty_value():
-    """Test setting an empty value to max file size."""
-    file_filter = FileFilter()
-
-    # Since there is no validation, an empty value would still set it to the empty string
-    file_filter.setMaxFileSize("")
-    assert file_filter.maxFileSize == "", "Failed to set max file size to empty value"
diff --git a/tests/fileFilter_test.py b/tests/fileFilter_test.py
new file mode 100644
index 0000000..beb1eef
--- /dev/null
+++ b/tests/fileFilter_test.py
@@ -0,0 +1,44 @@
+import pytest
+from twinTrim.dataStructures.fileFilter import FileFilter
+
+
+def test_set_min_file_size_valid():
+    """Test setting valid minimum file size values."""
+    file_filter = FileFilter()
+
+    # Test with a larger valid size
+    file_filter.setMinFileSize("20kb")
+    assert file_filter.minFileSize == "20kb", "Failed to set min file size to 20kb"
+
+    # Test with a smaller valid size
+    file_filter.setMinFileSize("5kb")
+    assert file_filter.minFileSize == "5kb", "Failed to set min file size to 5kb"
+
+    # Test with an edge case (1kb)
+    file_filter.setMinFileSize("1kb")
+    assert file_filter.minFileSize == "1kb", "Failed to set min file size to 1kb"
+
+def test_set_min_file_size_empty_string():
+    """Test setting an empty string for minimum file size."""
+    file_filter = FileFilter()
+
+    # Empty string should be allowed since no validation exists
+    file_filter.setMinFileSize("")
+    assert file_filter.minFileSize == "", "Failed to set min file size to an empty string"
+
+def test_set_min_file_size_special_characters():
+    """Test setting special characters or random string as min file size."""
+    file_filter = FileFilter()
+
+    # Special characters should be accepted since no validation exists
+    file_filter.setMinFileSize("!!invalid!!")
+    assert file_filter.minFileSize == "!!invalid!!", "Failed to set min file size to special characters"
+
+def test_set_min_file_size_numeric_string():
+    """Test setting numeric string as minimum file size."""
+    file_filter = FileFilter()
+
+    # Numeric string should be accepted, even without units
+    file_filter.setMinFileSize("123")
+    assert file_filter.minFileSize == "123", "Failed to set min file size to a numeric string"
+
diff --git a/tests/fileMetadata.py b/tests/fileMetadata.py
new file mode 100644
index 0000000..507f1e5
--- /dev/null
+++ b/tests/fileMetadata.py
@@ -0,0 +1,76 @@
+import threading
+import pytest
+from twinTrim.dataStructures.fileMetadata import add_or_update_normal_file, normalStore, normalStore_lock
+
+# Mocking the get_file_hash function so that we don't have to worry about the actual file
+def mock_get_file_hash(file_path):
+    return f"hash_{file_path}"
+  
+# This will automatically replaces the get_file_hash function with the mock_get_file_hash function
+@pytest.fixture(autouse=True)
+def mock_get_file_hash_func(monkeypatch):
+    monkeypatch.setattr("twinTrim.dataStructures.fileMetadata.get_file_hash", mock_get_file_hash)
+    
+# Automatically reset the normalStore before each test
+@pytest.fixture(autouse=True)
+def reset_normal_store():
+    normalStore.clear()
+    
+def test_add_or_update_normal_file_concurrently():
+  "Test that normalStore is consistant when add_or_update_normal_file is called concurrently with different file paths by multiple threads"
+  
+  # List of file paths to be added concurrently
+  file_paths = [f"file_{i}" for i in range(10)]
+  
+  # this function will be called by each thread to add a file path
+  def worker(file_path):
+    add_or_update_normal_file(file_path)
+    
+  # Threads for concurrent execution
+  threads = [threading.Thread(target=worker, args=(file_path,)) for file_path in file_paths]
+  
+  # starting all the threads for concurrent execution
+  for thread in threads:
+    thread.start()
+    
+  # waiting for all the threads to finish
+  for thread in threads:
+    thread.join()
+    
+  # Checking that normalStore has exactly 10 unique file hashes (since all file paths are unique)
+  assert len(normalStore) == 10
+  
+  # Checking that each file hash has exactly 1 file path
+  for file_path in file_paths:
+    file_hash = mock_get_file_hash(file_path)
+    assert file_hash in normalStore
+    assert normalStore[file_hash].filepaths == [file_path]
+    
+def test_add_or_update_normal_file_with_duplicates_concurrently():
+  "Test that adding duplicate file paths to normalStore does not create duplicate entries"
+  
+  file_paths = "duplicate_file.txt"
+  num_threads = 5
+  
+  # this function will be called by each thread to add a file path
+  def worker():
+    add_or_update_normal_file(file_paths)
+    
+  # Create a list of threads to add the same file path concurrently
+  threads = [threading.Thread(target=worker) for _ in range(num_threads)]
+  
+  # starting all the threads for concurrent execution
+  for thread in threads:
+    thread.start()
+    
+  # waiting for all the threads to finish
+  for thread in threads:
+    thread.join()
+    
+  # Checking that normalStore has exactly 1 unique file hash (since all file paths are the same)
+  file_hash = mock_get_file_hash(file_paths)
+  assert len(normalStore) == 1
+  assert file_hash in normalStore
+  
+  # Checking that the file path is added only once despite being added by multiple threads
+  assert normalStore[file_hash].filepaths == [file_paths]
\ No newline at end of file
diff --git a/twinTrim/dataStructures/fileFilter.py b/twinTrim/dataStructures/fileFilter.py
index 86bf6e2..e2d210d 100644
--- a/twinTrim/dataStructures/fileFilter.py
+++ b/twinTrim/dataStructures/fileFilter.py
@@ -3,7 +3,7 @@
 
 class FileFilter:
     def __init__(self):
-        self.minFileSize = "10kb"
+        self.minFileSize = "0kb"
         self.maxFileSize = "1gb"
         self.fileType = r"^.+\.*$" 
         self.fileExclude = []
diff --git a/twinTrim/dataStructures/fileMetadata.py b/twinTrim/dataStructures/fileMetadata.py
index 09cbc14..e3c92bb 100644
--- a/twinTrim/dataStructures/fileMetadata.py
+++ b/twinTrim/dataStructures/fileMetadata.py
@@ -27,5 +27,4 @@ def add_or_update_normal_file(file_path: str):
         if existing_file_metadata is None:
             normalStore[file_hash] = new_file_metadata
         else:
-            existing_file_metadata.insert_file(file_path)
-
+            existing_file_metadata.insert_file(file_path)
\ No newline at end of file
diff --git a/twinTrim/flagController.py b/twinTrim/flagController.py
index 23d333e..25cbfbb 100644
--- a/twinTrim/flagController.py
+++ b/twinTrim/flagController.py
@@ -7,12 +7,20 @@
 from twinTrim.dataStructures.fileMetadata import FileMetadata, normalStore , add_or_update_normal_file
 from tqdm import tqdm
 
-def handleAllFlag(directory,file_filter):
+#bar function to be used by scanner thread pools
+progress_bar_format = "{desc}: {n_fmt}/{total_fmt} | ETA={remaining} | {rate_fmt} {bar} {percentage:.3f}%"
+"""adaptive progress bar, returns tqdm object"""
+def progress_bar_func(bar_desc, total, unit='file',color="yellow", bar_color='white'):
+    try: #default to yellow
+        bar_desc_obj = click.style(bar_desc, fg=color, bold=True) # set to bold by default
+    except:
+        print(f"Warning, invalid ColorType: {color} falling back to default yellow.")
+        bar_desc_obj = click.style(bar_desc, fg='yellow', bold=True)
+    return tqdm(total=total, desc=bar_desc_obj, unit=unit, bar_format= progress_bar_format, colour=bar_color)
+
+def handleAllFlag(directory,file_filter,pb_color,bar_color):
     """Handle all duplicates automatically without asking if --all flag is set."""
     all_start_time = time.time()
-    yellow = '\033[93m'
-    reset = '\033[0m'
-    progress_bar_format = f"{yellow}{{l_bar}}{{bar}}{{r_bar}}{{bar}}{reset}"
 
     # Collect all file paths to process
     all_files = [os.path.join(root, file_name) for root, _, files in os.walk(directory) for file_name in files]
@@ -20,7 +28,7 @@ def handleAllFlag(directory,file_filter):
     total_files = len(all_files)
 
     # Use ThreadPoolExecutor to handle files concurrently
-    with ThreadPoolExecutor() as executor, tqdm(total=total_files, desc="Scanning files", unit="file", bar_format=progress_bar_format) as progress_bar:
+    with ThreadPoolExecutor() as executor, progress_bar_func("Scanning", total_files, color=pb_color, bar_color=bar_color) as progress_bar:
         futures = {executor.submit(add_or_update_file, file_path): file_path for file_path in all_files}
 
         # Update progress bar as files are processed
@@ -35,7 +43,7 @@ def handleAllFlag(directory,file_filter):
     click.echo(click.style("All duplicates deleted!", fg='green'))
 
 
-def find_duplicates(directory, file_filter):
+def find_duplicates(directory, file_filter, pb_color, bar_color):
     """Find duplicate files in the given directory and store them in normalStore."""
     # Collect all file paths first and apply filters
     all_files = [os.path.join(root, file_name) for root, _, files in os.walk(directory) for file_name in files]
@@ -43,16 +51,11 @@ def find_duplicates(directory, file_filter):
 
     # Calculate the total number of files and ensure it is finite
     total_files = len(all_files)
-    
-    # Define yellow color ANSI escape code
-    yellow = '\033[93m'
-    reset = '\033[0m'
-    progress_bar_format = f"{yellow}{{l_bar}}{{bar}}{{r_bar}}{{bar}}{reset}"
 
     def process_file(file_path):
         add_or_update_normal_file(file_path)
 
-    with ThreadPoolExecutor() as executor, tqdm(total=total_files, desc="Scanning files", unit="file", bar_format=progress_bar_format) as progress_bar:
+    with ThreadPoolExecutor() as executor, progress_bar_func("Hashing", total_files, color=pb_color, bar_color=bar_color) as progress_bar:
         # Submit tasks to the executor
         futures = {executor.submit(process_file, file_path): file_path for file_path in all_files}
         
diff --git a/twinTrim/flags.py b/twinTrim/flags.py
index a0d8136..1d8fce6 100644
--- a/twinTrim/flags.py
+++ b/twinTrim/flags.py
@@ -10,11 +10,13 @@
 @click.command()
 @click.argument("directory", type=click.Path(exists=True))
 @click.option("--all", is_flag=True, help="Delete duplicates automatically without asking.")
-@click.option("--min-size", default="10kb", type=str, help="Minimum file size in bytes.")
+@click.option("--min-size", default="0kb", type=str, help="Minimum file size in bytes.")
 @click.option("--max-size", default="1gb", type=str, help="Maximum file size in bytes.")
 @click.option("--file-type", default=".*", help="File type to include (e.g., .txt, .jpg).")
 @click.option("--exclude", multiple=True, help="Files to exclude by name.")
-def cli(directory, all, min_size, max_size, file_type, exclude):
+@click.option("--label-color", default="yellow", type=str, help="Color of the label of progress bar.")
+@click.option("--bar-color", default='#aaaaaa', type=str, help="Color of the progress bar.")
+def cli(directory, all, min_size, max_size, file_type, exclude, label_color, bar_color):
     """Find and manage duplicate files in the specified DIRECTORY."""
 
     # Initialize the FileFilter object
@@ -26,11 +28,11 @@ def cli(directory, all, min_size, max_size, file_type, exclude):
         file_filter.addFileExclude(file_name)
 
     if all:
-        handleAllFlag(directory, file_filter)
+        handleAllFlag(directory, file_filter, label_color, bar_color)
         return
 
     start_time = time.time()
-    duplicates = find_duplicates(directory, file_filter)
+    duplicates = find_duplicates(directory, file_filter, label_color, bar_color)
 
     end_time = time.time()
     time_taken = end_time - start_time