diff --git a/src/f5_tts/train/datasets/prepare_csv_wavs.py b/src/f5_tts/train/datasets/prepare_csv_wavs.py
index 26ad6f8..4717b8b 100644
--- a/src/f5_tts/train/datasets/prepare_csv_wavs.py
+++ b/src/f5_tts/train/datasets/prepare_csv_wavs.py
@@ -208,11 +208,11 @@ def save_prepped_dataset(out_dir, result, duration_list, text_vocab_set, is_fine
     out_dir.mkdir(exist_ok=True, parents=True)
     print(f"\nSaving to {out_dir} ...")
 
-    # Save dataset with improved batch size for better I/O performance
     raw_arrow_path = out_dir / "raw.arrow"
-    with ArrowWriter(path=raw_arrow_path.as_posix(), writer_batch_size=100) as writer:
+    with ArrowWriter(path=raw_arrow_path.as_posix()) as writer:
         for line in tqdm(result, desc="Writing to raw.arrow ..."):
             writer.write(line)
+        writer.finalize()
 
     # Save durations to JSON
     dur_json_path = out_dir / "duration.json"
diff --git a/src/f5_tts/train/datasets/prepare_emilia.py b/src/f5_tts/train/datasets/prepare_emilia.py
index 4c4a771..7c6b805 100644
--- a/src/f5_tts/train/datasets/prepare_emilia.py
+++ b/src/f5_tts/train/datasets/prepare_emilia.py
@@ -181,6 +181,7 @@ def main():
     with ArrowWriter(path=f"{save_dir}/raw.arrow") as writer:
         for line in tqdm(result, desc="Writing to raw.arrow ..."):
             writer.write(line)
+        writer.finalize()
 
     # dup a json separately saving duration in case for DynamicBatchSampler ease
     with open(f"{save_dir}/duration.json", "w", encoding="utf-8") as f:
diff --git a/src/f5_tts/train/datasets/prepare_emilia_v2.py b/src/f5_tts/train/datasets/prepare_emilia_v2.py
index 50322c0..e839412 100644
--- a/src/f5_tts/train/datasets/prepare_emilia_v2.py
+++ b/src/f5_tts/train/datasets/prepare_emilia_v2.py
@@ -68,6 +68,7 @@ def main():
     with ArrowWriter(path=f"{save_dir}/raw.arrow") as writer:
         for line in tqdm(result, desc="Writing to raw.arrow ..."):
             writer.write(line)
+        writer.finalize()
 
     with open(f"{save_dir}/duration.json", "w", encoding="utf-8") as f:
         json.dump({"duration": duration_list}, f, ensure_ascii=False)
diff --git a/src/f5_tts/train/datasets/prepare_libritts.py b/src/f5_tts/train/datasets/prepare_libritts.py
index a892dd6..0a11eb0 100644
--- a/src/f5_tts/train/datasets/prepare_libritts.py
+++ b/src/f5_tts/train/datasets/prepare_libritts.py
@@ -62,6 +62,7 @@ def main():
     with ArrowWriter(path=f"{save_dir}/raw.arrow") as writer:
         for line in tqdm(result, desc="Writing to raw.arrow ..."):
             writer.write(line)
+        writer.finalize()
 
     # dup a json separately saving duration in case for DynamicBatchSampler ease
     with open(f"{save_dir}/duration.json", "w", encoding="utf-8") as f:
diff --git a/src/f5_tts/train/datasets/prepare_ljspeech.py b/src/f5_tts/train/datasets/prepare_ljspeech.py
index 9f64b0a..4a60e39 100644
--- a/src/f5_tts/train/datasets/prepare_ljspeech.py
+++ b/src/f5_tts/train/datasets/prepare_ljspeech.py
@@ -39,6 +39,7 @@ def main():
     with ArrowWriter(path=f"{save_dir}/raw.arrow") as writer:
         for line in tqdm(result, desc="Writing to raw.arrow ..."):
             writer.write(line)
+        writer.finalize()
 
     # dup a json separately saving duration in case for DynamicBatchSampler ease
     with open(f"{save_dir}/duration.json", "w", encoding="utf-8") as f:
diff --git a/src/f5_tts/train/finetune_gradio.py b/src/f5_tts/train/finetune_gradio.py
index eee2a3f..692c95c 100644
--- a/src/f5_tts/train/finetune_gradio.py
+++ b/src/f5_tts/train/finetune_gradio.py
@@ -796,9 +796,10 @@ def create_metadata(name_project, ch_tokenizer, progress=gr.Progress()):
     min_second = round(min(duration_list), 2)
     max_second = round(max(duration_list), 2)
 
-    with ArrowWriter(path=file_raw, writer_batch_size=1) as writer:
+    with ArrowWriter(path=file_raw) as writer:
         for line in progress.tqdm(result, total=len(result), desc="prepare data"):
             writer.write(line)
+        writer.finalize()
 
     with open(file_duration, "w") as f:
         json.dump({"duration": duration_list}, f, ensure_ascii=False)