diff --git a/ereuse_devicehub/resources/device/sync.py b/ereuse_devicehub/resources/device/sync.py
index 90403871..613f0b39 100644
--- a/ereuse_devicehub/resources/device/sync.py
+++ b/ereuse_devicehub/resources/device/sync.py
@@ -310,7 +310,25 @@ class Sync:
     def create_placeholder(device: Device):
         """If the device is new, we need create automaticaly a new placeholder"""
         if device.binding:
+            for c in device.components:
+                if c.phid():
+                    continue
+                c_dict = copy.copy(c.__dict__)
+                c_dict.pop('_sa_instance_state')
+                c_dict.pop('id', None)
+                c_dict.pop('devicehub_id', None)
+                c_dict.pop('actions_multiple', None)
+                c_dict.pop('actions_one', None)
+                c_placeholder = c.__class__(**c_dict)
+                c_placeholder.parent = c.parent.binding.device
+                c.parent = device
+                component_placeholder = Placeholder(
+                    device=c_placeholder, binding=c, is_abstract=True
+                )
+                db.session.add(c_placeholder)
+                db.session.add(component_placeholder)
             return
+
         dict_device = copy.copy(device.__dict__)
         dict_device.pop('_sa_instance_state')
         dict_device.pop('id', None)
diff --git a/scripts/datastorage_orphans.py b/scripts/datastorage_orphans.py
index 72148e94..46ce382b 100644
--- a/scripts/datastorage_orphans.py
+++ b/scripts/datastorage_orphans.py
@@ -30,6 +30,9 @@ def clone_device(device):
     new_device.devicehub_id = old_devicehub_id
     device.devicehub_id = None
     new_device.owner = device.owner
+    if device.parent and device.parent.binding:
+        new_device.parent = device.parent.binding.device
+
     db.session.add(new_device)
 
     placeholder = Placeholder(
diff --git a/tests/test_snapshot.py b/tests/test_snapshot.py
index a1c711b8..9e408f26 100644
--- a/tests/test_snapshot.py
+++ b/tests/test_snapshot.py
@@ -1381,3 +1381,35 @@ def test_system_uuid_motherboard(user: UserClient):
     snap2, _ = user.post(s, res=Snapshot, status=422)
     txt = "We have detected that a there is a device in your inventory"
     assert txt in snap2['message'][0]
+
+
+@pytest.mark.mvp
+@pytest.mark.usefixtures(conftest.app_context.__name__)
+def test_bug_4028_components(user: UserClient):
+    """Tests when we have one computer and then we change the disk, then
+    the new disk need to have placeholder too."""
+    s = yaml2json('real-eee-1001pxd.snapshot.12')
+    snap1, _ = user.post(s, res=Snapshot)
+    dev1 = m.Device.query.filter_by(id=snap1['device']['id']).one()
+    assert m.Placeholder.query.count() * 2 == m.Device.query.count()
+    components1 = [c for c in dev1.components]
+    for c in s['components']:
+        if c['type'] == 'HardDrive':
+            c['serialNumber'] = 'E2024242CV86MF'
+
+    s['uuid'] = str(uuid4())
+    snap2, _ = user.post(s, res=Snapshot)
+    dev2 = m.Device.query.filter_by(id=snap2['device']['id']).one()
+    components2 = [c for c in dev2.components]
+
+    assert '' not in [c.phid() for c in components1]
+    assert '' not in [c.phid() for c in components2]
+    assert len(components1) == len(components2)
+    assert m.Placeholder.query.count() == 16
+    assert m.Placeholder.query.count() * 2 == m.Device.query.count()
+    for c in m.Placeholder.query.filter():
+        assert c.binding
+        assert c.device
+
+    for c in m.Device.query.filter():
+        assert c.binding or c.placeholder