diff --git a/pyrogram/client/client.py b/pyrogram/client/client.py
index f58d3ceb..5181b029 100644
--- a/pyrogram/client/client.py
+++ b/pyrogram/client/client.py
@@ -1447,11 +1447,13 @@ class Client(Methods, BaseClient):
 
         file_total_parts = int(math.ceil(file_size / part_size))
         is_big = file_size > 10 * 1024 * 1024
+        pool_size = 3 if is_big else 1
+        workers_count = 4 if is_big else 1
         is_missing_part = file_id is not None
         file_id = file_id or self.rnd_id()
         md5_sum = md5() if not is_big and not is_missing_part else None
-        pool = [Session(self, self.dc_id, self.auth_key, is_media=True) for _ in range(3)]
-        workers = [asyncio.ensure_future(worker(session)) for session in pool for _ in range(4)]
+        pool = [Session(self, self.dc_id, self.auth_key, is_media=True) for _ in range(pool_size)]
+        workers = [asyncio.ensure_future(worker(session)) for session in pool for _ in range(workers_count)]
         queue = asyncio.Queue(16)
 
         try: