diff --git a/cognee/infrastructure/files/storage/S3FileStorage.py b/cognee/infrastructure/files/storage/S3FileStorage.py
index 7c5a1033c..a0d611241 100644
--- a/cognee/infrastructure/files/storage/S3FileStorage.py
+++ b/cognee/infrastructure/files/storage/S3FileStorage.py
@@ -21,10 +21,11 @@ class S3FileStorage(Storage):
     def __init__(self, storage_path: str):
         self.storage_path = storage_path
         s3_config = get_s3_config()
-        if s3_config.aws_access_key_id is not None and s3_config.aws_secret_access_key is not None:
+        if s3_config.aws_access_key_id is not None and s3_config.aws_secret_access_key is not None and s3_config.aws_session_token is not None:
             self.s3 = s3fs.S3FileSystem(
                 key=s3_config.aws_access_key_id,
                 secret=s3_config.aws_secret_access_key,
+                token=s3_config.aws_session_token,
                 anon=False,
                 endpoint_url=s3_config.aws_endpoint_url,
                 client_kwargs={"region_name": s3_config.aws_region},
@@ -146,6 +147,11 @@ class S3FileStorage(Storage):
             self.s3.isfile, os.path.join(self.storage_path.replace("s3://", ""), file_path)
         )
 
+    async def get_size(self, file_path: str) -> int:
+        return await run_async(
+            self.s3.size, os.path.join(self.storage_path.replace("s3://", ""), file_path)
+        )
+
     async def ensure_directory_exists(self, directory_path: str = ""):
         """
         Ensure that the specified directory exists, creating it if necessary.
diff --git a/cognee/infrastructure/files/storage/s3_config.py b/cognee/infrastructure/files/storage/s3_config.py
index 0b9372b7e..3b59bcd57 100644
--- a/cognee/infrastructure/files/storage/s3_config.py
+++ b/cognee/infrastructure/files/storage/s3_config.py
@@ -8,9 +8,9 @@ class S3Config(BaseSettings):
     aws_endpoint_url: Optional[str] = None
     aws_access_key_id: Optional[str] = None
     aws_secret_access_key: Optional[str] = None
+    aws_session_token: Optional[str] = None
     model_config = SettingsConfigDict(env_file=".env", extra="allow")
 
-
 @lru_cache
 def get_s3_config():
     return S3Config()
diff --git a/cognee/tasks/ingestion/resolve_data_directories.py b/cognee/tasks/ingestion/resolve_data_directories.py
index 1d3124a0c..cbd979e16 100644
--- a/cognee/tasks/ingestion/resolve_data_directories.py
+++ b/cognee/tasks/ingestion/resolve_data_directories.py
@@ -32,7 +32,7 @@ async def resolve_data_directories(
         import s3fs
 
         fs = s3fs.S3FileSystem(
-            key=s3_config.aws_access_key_id, secret=s3_config.aws_secret_access_key, anon=False
+            key=s3_config.aws_access_key_id, secret=s3_config.aws_secret_access_key,token=s3_config.aws_session_token, anon=False
         )
 
     for item in data: