diff --git a/cosmotech/coal/aws/s3.py b/cosmotech/coal/aws/s3.py
index 69626076..22f09202 100644
--- a/cosmotech/coal/aws/s3.py
+++ b/cosmotech/coal/aws/s3.py
@@ -33,6 +33,10 @@ def file_prefix(self):
             return self._configuration.bucket_prefix
         return ""
 
+    @file_prefix.setter
+    def file_prefix(self, value):
+        self._configuration.bucket_prefix = value
+
     @property
     def use_ssl(self):
         if "use_ssl" in self._configuration:
diff --git a/cosmotech/coal/azure/blob.py b/cosmotech/coal/azure/blob.py
index 1bada51a..7958097c 100644
--- a/cosmotech/coal/azure/blob.py
+++ b/cosmotech/coal/azure/blob.py
@@ -101,3 +101,26 @@ def data_upload(data_stream: BytesIO, file_name: str):
                 T("coal.common.data_transfer.sending_table").format(table_name=table_name, output_type=output_type)
             )
             data_upload(_data_stream, _file_name)
+
+
+def delete_azure_blobs(configuration: Configuration = Configuration()) -> None:
+    container_client = BlobServiceClient(
+        account_url=f"https://{configuration.azure.account_name}.blob.core.windows.net/",
+        credential=ClientSecretCredential(
+            tenant_id=configuration.azure.tenant_id,
+            client_id=configuration.azure.client_id,
+            client_secret=configuration.azure.client_secret,
+        ),
+    ).get_container_client(configuration.azure.container_name)
+
+    file_prefix = configuration.safe_get("azure.file_prefix", default="")
+    # List and delete blobs in batches of 256 as the limit is specified in the doc.
+    # https://learn.microsoft.com/en-us/python/api/azure-storage-blob/azure.storage.blob.aio.containerclient?view=azure-python#azure-storage-blob-aio-containerclient-delete-blobs
+    blob_names_batch: list[str] = []
+    for blob in container_client.list_blobs(name_starts_with=file_prefix):
+        blob_names_batch.append(blob.name)
+        if len(blob_names_batch) >= 256:
+            container_client.delete_blobs(*blob_names_batch)
+            blob_names_batch = []
+    if blob_names_batch:
+        container_client.delete_blobs(*blob_names_batch)
diff --git a/cosmotech/coal/postgresql/runner.py b/cosmotech/coal/postgresql/runner.py
index 683628bb..49d1638f 100644
--- a/cosmotech/coal/postgresql/runner.py
+++ b/cosmotech/coal/postgresql/runner.py
@@ -103,10 +103,11 @@ def remove_runner_metadata_from_postgresql(
     with dbapi.connect(_psql.full_uri, autocommit=True) as conn:
         with conn.cursor() as curs:
             schema_table = f"{_psql.db_schema}.{_psql.table_prefix}RunnerMetadata"
+            last_run_id = runner.get("lastRunInfo").get("lastRunId")
             sql_delete_from_metatable = f"""
                 DELETE FROM {schema_table}
-                WHERE last_csm_run_id={runner.get("lastRunId")};
+                WHERE last_csm_run_id= $1;
             """
-            curs.execute(sql_delete_from_metatable)
+            curs.execute(sql_delete_from_metatable, (last_run_id,))
             conn.commit()
-    return runner.get("lastRunId")
+    return runner.get("lastRunInfo").get("lastRunId")
diff --git a/cosmotech/coal/store/output/aws_channel.py b/cosmotech/coal/store/output/aws_channel.py
index c5a24428..13590683 100644
--- a/cosmotech/coal/store/output/aws_channel.py
+++ b/cosmotech/coal/store/output/aws_channel.py
@@ -8,16 +8,16 @@
 from cosmotech.coal.aws import S3
 from cosmotech.coal.store.output.channel_interface import (
     ChannelInterface,
-    MissingChannelConfigError,
 )
 from cosmotech.coal.store.store import Store
-from cosmotech.coal.utils.configuration import Configuration, Dotdict
+from cosmotech.coal.utils.configuration import Dotdict
 from cosmotech.coal.utils.logger import LOGGER
 
 
 class AwsChannel(ChannelInterface):
     required_keys = {
         "coal": ["store"],
+        "cosmotech": ["runner_id"],
         "s3": ["access_key_id", "endpoint_url", "secret_access_key"],
     }
     requirement_string = required_keys
@@ -25,6 +25,7 @@ class AwsChannel(ChannelInterface):
     def __init__(self, dct: Dotdict = None):
         super().__init__(dct)
         self._s3 = S3(self.configuration)
+        self._s3.file_prefix = self.configuration.cosmotech.runner_id + "/" + self._s3.file_prefix
 
     def send(self, filter: Optional[list[str]] = None) -> bool:
 
@@ -36,12 +37,7 @@ def send(self, filter: Optional[list[str]] = None) -> bool:
 
         if self._s3.output_type == "sqlite":
             _file_path = _s._database_path
-            _file_name = "db.sqlite"
-            _uploaded_file_name = self.configuration.s3.bucket_prefix + _file_name
-            LOGGER.info(
-                T("coal.common.data_transfer.file_sent").format(file_path=_file_path, uploaded_name=_uploaded_file_name)
-            )
-            self._s3.upload_file(_file_path, _uploaded_file_name)
+            self._s3.upload_file(_file_path)
         else:
             tables = list(_s.list_tables())
             if filter:
diff --git a/cosmotech/coal/store/output/az_storage_channel.py b/cosmotech/coal/store/output/az_storage_channel.py
index a51eec8d..a4ee9a8c 100644
--- a/cosmotech/coal/store/output/az_storage_channel.py
+++ b/cosmotech/coal/store/output/az_storage_channel.py
@@ -1,16 +1,16 @@
 from typing import Optional
 
-from cosmotech.coal.azure.blob import dump_store_to_azure
+from cosmotech.coal.azure.blob import delete_azure_blobs, dump_store_to_azure
 from cosmotech.coal.store.output.channel_interface import (
     ChannelInterface,
-    MissingChannelConfigError,
 )
-from cosmotech.coal.utils.configuration import Configuration, Dotdict
+from cosmotech.coal.utils.configuration import Dotdict
 
 
 class AzureStorageChannel(ChannelInterface):
     required_keys = {
         "coal": ["store"],
+        "cosmotech": ["runner_id"],
         "azure": [
             "account_name",
             "container_name",
@@ -23,6 +23,13 @@ class AzureStorageChannel(ChannelInterface):
     }
     requirement_string = required_keys
 
+    def __init__(self, dct: Dotdict = None):
+        super().__init__(dct)
+        runner_id = self.configuration.cosmotech.runner_id
+        prefix = self.configuration.azure.file_prefix
+        if not prefix.startswith(runner_id):
+            self.configuration.azure.file_prefix = runner_id + "/" + prefix
+
     def send(self, filter: Optional[list[str]] = None) -> bool:
         dump_store_to_azure(
             self.configuration,
@@ -30,4 +37,4 @@ def send(self, filter: Optional[list[str]] = None) -> bool:
         )
 
     def delete(self):
-        pass
+        delete_azure_blobs(self.configuration)
diff --git a/cosmotech/coal/store/output/channel_spliter.py b/cosmotech/coal/store/output/channel_spliter.py
index 98d934d6..e5ff6739 100644
--- a/cosmotech/coal/store/output/channel_spliter.py
+++ b/cosmotech/coal/store/output/channel_spliter.py
@@ -49,7 +49,7 @@ def send(self, filter: Optional[list[str]] = None) -> bool:
                     raise
         return any_ok
 
-    def delete(self, filter: Optional[list[str]] = None) -> bool:
+    def delete(self) -> bool:
         any_ok = False
         for i in self.targets:
             try:
diff --git a/cosmotech/csm_data/commands/store/delete.py b/cosmotech/csm_data/commands/store/delete.py
new file mode 100644
index 00000000..cb99e624
--- /dev/null
+++ b/cosmotech/csm_data/commands/store/delete.py
@@ -0,0 +1,24 @@
+# Copyright (C) - 2023 - 2025 - Cosmo Tech
+# This document and all information contained herein is the exclusive property -
+# including all intellectual property rights pertaining thereto - of Cosmo Tech.
+# Any use, reproduction, translation, broadcasting, transmission, distribution,
+# etc., to any person is prohibited unless it has been previously and
+# specifically authorized by written means by Cosmo Tech.
+
+from cosmotech.csm_data.utils.click import click
+from cosmotech.csm_data.utils.decorators import translate_help, web_help
+
+
+@click.command()
+@web_help("csm-data/store/delete")
+@translate_help("csm_data.commands.store.delete.description")
+def delete():
+    # Import the function at the start of the command
+    from cosmotech.coal.store.output import channel_spliter
+    from cosmotech.coal.utils.configuration import Configuration
+
+    try:
+        _cs = channel_spliter.ChannelSpliter(Configuration())
+        _cs.delete()
+    except ValueError as e:
+        raise click.Abort() from e
diff --git a/cosmotech/csm_data/commands/store/store.py b/cosmotech/csm_data/commands/store/store.py
index ec361152..47be8957 100644
--- a/cosmotech/csm_data/commands/store/store.py
+++ b/cosmotech/csm_data/commands/store/store.py
@@ -5,6 +5,7 @@
 # etc., to any person is prohibited unless it has been previously and
 # specifically authorized by written means by Cosmo Tech.
 
+from cosmotech.csm_data.commands.store.delete import delete
 from cosmotech.csm_data.commands.store.dump_to_azure import dump_to_azure
 from cosmotech.csm_data.commands.store.dump_to_postgresql import dump_to_postgresql
 from cosmotech.csm_data.commands.store.dump_to_s3 import dump_to_s3
@@ -34,3 +35,4 @@ def store():
 store.add_command(dump_to_s3, "dump-to-s3")
 store.add_command(dump_to_azure, "dump-to-azure")
 store.add_command(output, "output")
+store.add_command(delete, "delete")
diff --git a/cosmotech/translation/csm_data/en-US/csm_data/commands/store/delete.yml b/cosmotech/translation/csm_data/en-US/csm_data/commands/store/delete.yml
new file mode 100644
index 00000000..cc219bc6
--- /dev/null
+++ b/cosmotech/translation/csm_data/en-US/csm_data/commands/store/delete.yml
@@ -0,0 +1,4 @@
+description: |
+  Delete simulation result from where the output command pushed data.
+
+  This delete is base on the configuration.
diff --git a/cosmotech/translation/csm_data/en-US/csm_data/commands/store/output.yml b/cosmotech/translation/csm_data/en-US/csm_data/commands/store/output.yml
index df538a64..0bb960e3 100644
--- a/cosmotech/translation/csm_data/en-US/csm_data/commands/store/output.yml
+++ b/cosmotech/translation/csm_data/en-US/csm_data/commands/store/output.yml
@@ -1,7 +1,7 @@
 description: |
   Dump simulation from the coal store to the configured output.
 
-  This output is base on the configuration. Default dconfiguration will try to output in postgres.
+  This output is base on the configuration.
 
 parameters:
   filter: names of the tables to output
diff --git a/tests/unit/coal/test_postgresql/test_postgresql_runner.py b/tests/unit/coal/test_postgresql/test_postgresql_runner.py
index d50ff91e..711099af 100644
--- a/tests/unit/coal/test_postgresql/test_postgresql_runner.py
+++ b/tests/unit/coal/test_postgresql/test_postgresql_runner.py
@@ -112,7 +112,7 @@ def test_remove_runner_metadata_to_postgresql(self, mock_connect, mock_postgres_
         mock_runner = {
             "id": "test-runner-id",
             "name": "Test Runner",
-            "lastRunId": "test-run-id",
+            "lastRunInfo": {"lastRunId": "test-run-id"},
             "runTemplateId": "test-template-id",
         }
 
diff --git a/tests/unit/coal/test_postgresql/test_postgresql_utils.py b/tests/unit/coal/test_postgresql/test_postgresql_utils.py
index 2c3eafc0..adb03444 100644
--- a/tests/unit/coal/test_postgresql/test_postgresql_utils.py
+++ b/tests/unit/coal/test_postgresql/test_postgresql_utils.py
@@ -110,7 +110,6 @@ def test_get_postgresql_table_schema_not_found(self, mock_connect, base_configur
         # Arrange
         target_table_name = "test_table"
         _psql = PostgresUtils(base_configuration)
-        print(base_configuration.postgres)
 
         # Mock connection and cursor
         mock_conn = MagicMock()
diff --git a/tests/unit/coal/test_store/test_output/test_aws_channel.py b/tests/unit/coal/test_store/test_output/test_aws_channel.py
index 33e83a1f..13ba9d72 100644
--- a/tests/unit/coal/test_store/test_output/test_aws_channel.py
+++ b/tests/unit/coal/test_store/test_output/test_aws_channel.py
@@ -17,7 +17,11 @@
 def base_aws_config():
     return {
         "coal": {"store": "$cosmotech.parameters_absolute_path"},
-        "cosmotech": {"dataset_absolute_path": "/path/to/dataset", "parameters_absolute_path": "/path/to/params"},
+        "cosmotech": {
+            "runner_id": "runner-789",
+            "dataset_absolute_path": "/path/to/dataset",
+            "parameters_absolute_path": "/path/to/params",
+        },
         "s3": {
             "access_key_id": "test_key",
             "endpoint_url": "http://test.url",
@@ -30,11 +34,11 @@ def base_aws_config():
 class TestAwsChannel:
     """Tests for the AwsChannel class."""
 
-    def test_init_with_configuration(self, base_aws_config):
+    @patch("cosmotech.coal.store.output.aws_channel.S3")
+    def test_init_with_configuration(self, mock_s3_class, base_aws_config):
         """Test AwsChannel initialization with configuration."""
         # Act
-        with patch("cosmotech.coal.store.output.aws_channel.S3"):
-            channel = AwsChannel(base_aws_config)
+        channel = AwsChannel(base_aws_config)
 
         # Assert
         assert channel.configuration is not None
@@ -44,6 +48,8 @@ def test_required_keys(self):
         # Assert
         assert "coal" in AwsChannel.required_keys
         assert "s3" in AwsChannel.required_keys
+        assert "cosmotech" in AwsChannel.required_keys
+        assert "runner_id" in AwsChannel.required_keys["cosmotech"]
         assert "store" in AwsChannel.required_keys["coal"]
         assert "access_key_id" in AwsChannel.required_keys["s3"]
         assert "endpoint_url" in AwsChannel.required_keys["s3"]
@@ -68,7 +74,7 @@ def test_send_sqlite(self, mock_s3_class, mock_store_class, base_aws_config):
         channel.send()
 
         # Assert
-        mock_s3.upload_file.assert_called_once_with("/path/to/db.sqlite", "prefix/db.sqlite")
+        mock_s3.upload_file.assert_called_once_with("/path/to/db.sqlite")
 
     @patch("cosmotech.coal.store.output.aws_channel.Store")
     @patch("cosmotech.coal.store.output.aws_channel.S3")
diff --git a/tests/unit/coal/test_store/test_output/test_az_storage_channel.py b/tests/unit/coal/test_store/test_output/test_az_storage_channel.py
index fad986d2..3f15a222 100644
--- a/tests/unit/coal/test_store/test_output/test_az_storage_channel.py
+++ b/tests/unit/coal/test_store/test_output/test_az_storage_channel.py
@@ -18,7 +18,11 @@ def base_azure_storage_config():
     return Configuration(
         {
             "coal": {"store": "$cosmotech.parameters_absolute_path"},
-            "cosmotech": {"dataset_absolute_path": "/path/to/dataset", "parameters_absolute_path": "/path/to/params"},
+            "cosmotech": {
+                "runner_id": "r-789",
+                "dataset_absolute_path": "/path/to/dataset",
+                "parameters_absolute_path": "/path/to/params",
+            },
             "azure": {
                 "account_name": "test_account",
                 "container_name": "test_container",
@@ -62,20 +66,25 @@ def test_required_keys(self):
     @patch("cosmotech.coal.azure.blob.ClientSecretCredential")
     def test_send_without_filter(self, mock_client_secret, mock_store, mock_dump, base_azure_storage_config):
         """Test sending data without table filter."""
+        # Arrange
         channel = AzureStorageChannel(base_azure_storage_config)
 
         # Act
         channel.send()
 
         # Assert
-        mock_dump.assert_called_once_with(base_azure_storage_config, selected_tables=None)
+        expected_config = base_azure_storage_config
+        expected_config.azure.file_prefix = (
+            base_azure_storage_config.cosmotech.runner_id + "/" + base_azure_storage_config.azure.file_prefix
+        )
+        mock_dump.assert_called_once_with(expected_config, selected_tables=None)
 
     @patch("cosmotech.coal.store.output.az_storage_channel.dump_store_to_azure")
     @patch("cosmotech.coal.azure.blob.Store")
     @patch("cosmotech.coal.azure.blob.ClientSecretCredential")
     def test_send_with_filter(self, mock_client_secret, mock_store, mock_dump, base_azure_storage_config):
         """Test sending data with table filter."""
-
+        # Arrange
         channel = AzureStorageChannel(base_azure_storage_config)
         tables_filter = ["table1", "table2"]
 
@@ -83,18 +92,28 @@ def test_send_with_filter(self, mock_client_secret, mock_store, mock_dump, base_
         channel.send(filter=tables_filter)
 
         # Assert
+        expected_config = base_azure_storage_config
+        expected_config.azure.file_prefix = (
+            base_azure_storage_config.cosmotech.runner_id + "/" + base_azure_storage_config.azure.file_prefix
+        )
         mock_dump.assert_called_once_with(
-            base_azure_storage_config,
+            expected_config,
             selected_tables=["table1", "table2"],
         )
 
-    def test_delete(self, base_azure_storage_config):
+    @patch("cosmotech.coal.store.output.az_storage_channel.delete_azure_blobs")
+    @patch("cosmotech.coal.azure.blob.Store")
+    @patch("cosmotech.coal.azure.blob.ClientSecretCredential")
+    def test_delete(self, mock_client_secret, mock_store, mock_delete, base_azure_storage_config):
         """Test delete method (should do nothing)."""
         channel = AzureStorageChannel(base_azure_storage_config)
 
         # Act
-        result = channel.delete()
+        channel.delete()
 
         # Assert
-        # Should not raise any exception and return None
-        assert result is None
+        expected_config = base_azure_storage_config
+        expected_config.azure.file_prefix = (
+            base_azure_storage_config.cosmotech.runner_id + "/" + base_azure_storage_config.azure.file_prefix
+        )
+        mock_delete.assert_called_once_with(expected_config)