diff --git a/06_gpu_and_ml/dreambooth/dreambooth_app.py b/06_gpu_and_ml/dreambooth/dreambooth_app.py
index 21661ddad..9f8cec5af 100644
--- a/06_gpu_and_ml/dreambooth/dreambooth_app.py
+++ b/06_gpu_and_ml/dreambooth/dreambooth_app.py
@@ -282,6 +282,7 @@ class Model:
     def __enter__(self):
         import torch
         from diffusers import DDIMScheduler, StableDiffusionPipeline
+
         # Reload the modal.Volume to ensure the latest state is accessible.
         stub.app.volume.reload()
 
diff --git a/06_gpu_and_ml/flan_t5/flan_t5_finetune.py b/06_gpu_and_ml/flan_t5/flan_t5_finetune.py
index f3f434dbb..956805fa8 100644
--- a/06_gpu_and_ml/flan_t5/flan_t5_finetune.py
+++ b/06_gpu_and_ml/flan_t5/flan_t5_finetune.py
@@ -21,7 +21,7 @@
 
 from pathlib import Path
 
-from modal import Image, NetworkFileSystem, Stub, method, wsgi_app
+from modal import Image, Volume, Stub, method, wsgi_app
 
 VOL_MOUNT_PATH = Path("/vol")
 
@@ -37,7 +37,8 @@
 )
 
 stub = Stub(name="example-news-summarizer", image=image)
-output_vol = NetworkFileSystem.persisted("finetune-vol")
+output_vol = Volume.persisted("finetune-volume")
+stub.volume = output_vol
 
 # ## Finetuning Flan-T5 on XSum dataset
 #
@@ -47,7 +48,7 @@
 @stub.function(
     gpu="A10g",
     timeout=7200,
-    network_file_systems={VOL_MOUNT_PATH: output_vol},
+    volumes={VOL_MOUNT_PATH: output_vol},
 )
 def finetune(num_train_epochs: int = 1, size_percentage: int = 10):
     from datasets import load_dataset
@@ -57,6 +58,7 @@ def finetune(num_train_epochs: int = 1, size_percentage: int = 10):
         DataCollatorForSeq2Seq,
         Seq2SeqTrainer,
         Seq2SeqTrainingArguments,
+        TrainerCallback,
     )
 
     # Use size percentage to retrieve subset of the dataset to iterate faster
@@ -121,6 +123,17 @@ def preprocess(batch):
         pad_to_multiple_of=batch_size,
     )
 
+    class CheckpointCallback(TrainerCallback):
+        def __init__(self, volume):
+            self.volume = volume
+
+        def on_save(self, args, state, control, **kwargs):
+            """
+            Event called after a checkpoint save.
+            """
+            print("running commit on modal.Volume after model checkpoint")
+            self.volume.commit()
+
     training_args = Seq2SeqTrainingArguments(
         # Save checkpoints to the mounted volume
         output_dir=str(VOL_MOUNT_PATH / "model"),
@@ -142,6 +155,7 @@ def preprocess(batch):
     trainer = Seq2SeqTrainer(
         model=model,
         args=training_args,
+        callbacks=[CheckpointCallback(stub.app.volume)],
         data_collator=data_collator,
         train_dataset=tokenized_xsum_train,
         eval_dataset=tokenized_xsum_test,
@@ -152,6 +166,7 @@ def preprocess(batch):
     # Save the trained model and tokenizer to the mounted volume
     model.save_pretrained(str(VOL_MOUNT_PATH / "model"))
     tokenizer.save_pretrained(str(VOL_MOUNT_PATH / "tokenizer"))
+    stub.app.volume.commit()
 
 
 # ## Monitoring Finetuning with Tensorboard
@@ -159,7 +174,7 @@ def preprocess(batch):
 # Tensorboard is an application for visualizing training loss. In this example we
 # serve it as a Modal WSGI app.
 #
-@stub.function(network_file_systems={VOL_MOUNT_PATH: output_vol})
+@stub.function(volumes={VOL_MOUNT_PATH: output_vol})
 @wsgi_app()
 def monitor():
     import tensorboard
@@ -181,7 +196,7 @@ def monitor():
 #
 
 
-@stub.cls(network_file_systems={VOL_MOUNT_PATH: output_vol})
+@stub.cls(volumes={VOL_MOUNT_PATH: output_vol})
 class Summarizer:
     def __enter__(self):
         from transformers import AutoModelForSeq2SeqLM, AutoTokenizer, pipeline
@@ -228,14 +243,14 @@ def main():
 # Invoke model finetuning use the provided command below
 #
 # ```bash
-# modal run --detach finetune.py::finetune --num-train-epochs=1 --size-percentage=10
+# modal run --detach flan_t5_finetune.py::finetune --num-train-epochs=1 --size-percentage=10
 # View the tensorboard logs at https://<username>--example-news-summarizer-monitor-dev.modal.run
 # ```
 #
 # Invoke finetuned model inference via local entrypoint
 #
 # ```bash
-# modal run finetune.py
+# modal run flan_t5_finetune.py
 # World number one Tiger Woods missed the cut at the US Open as he failed to qualify for the final round of the event in Los Angeles.
 # ```
 #