diff --git a/frappe/integrations/offsite_backup_utils.py b/frappe/integrations/offsite_backup_utils.py
index 416d656d90..4242676d94 100644
--- a/frappe/integrations/offsite_backup_utils.py
+++ b/frappe/integrations/offsite_backup_utils.py
@@ -65,10 +65,7 @@ def get_latest_backup_file(with_files=False):
 	return database, config
 
 
-def get_file_size(file_path, unit):
-	if not unit:
-		unit = "MB"
-
+def get_file_size(file_path, unit='MB'):
 	file_size = os.path.getsize(file_path)
 
 	memory_size_unit_mapper = {"KB": 1, "MB": 2, "GB": 3, "TB": 4}
@@ -99,7 +96,7 @@ def get_chunk_site(file_size):
 def validate_file_size():
 	frappe.flags.create_new_backup = True
 	latest_file, site_config = get_latest_backup_file()
-	file_size = get_file_size(latest_file, unit="GB")
+	file_size = get_file_size(latest_file, unit="GB") if latest_file else 0
 
 	if file_size > 1:
 		frappe.flags.create_new_backup = False