diff --git a/ereuse_devicehub/resources/action/models.py b/ereuse_devicehub/resources/action/models.py
index b04e62ac..2f7cde4b 100644
--- a/ereuse_devicehub/resources/action/models.py
+++ b/ereuse_devicehub/resources/action/models.py
@@ -558,6 +558,8 @@ class Snapshot(JoinedWithOneDeviceMixin, ActionWithOneDevice):
                 if not act.type == "TestDataStorage":
                     continue
                 data['lifetime'] = act.lifetime
+                if not isinstance(act.lifetime, int):
+                    data['lifetime'] = act.lifetime.total_seconds()
                 break
             hdds.append(data)
 
diff --git a/ereuse_devicehub/resources/device/models.py b/ereuse_devicehub/resources/device/models.py
index 5d9346a3..7081ce49 100644
--- a/ereuse_devicehub/resources/device/models.py
+++ b/ereuse_devicehub/resources/device/models.py
@@ -346,7 +346,7 @@ class Device(Thing):
 
             if act.type == 'Live':
                 allocate = copy.copy(allo)
-                lifetime = act.usage_time_hdd
+                lifetime = act.usage_time_hdd.total_seconds()
                 allocate['type'] = 'Live'
                 allocate['liveCreate'] = act.created
                 for hd in lifestimes: