diff --git a/src/account/views.py b/src/account/views.py
index 4f88c5140b7e7c19be08f485d18798be2c627974..48c33edba904be2463f21c83b01a8696b3f00374 100644
--- a/src/account/views.py
+++ b/src/account/views.py
@@ -3,6 +3,7 @@ from rest_framework import permissions
 from rest_framework.response import Response
 from rest_framework.decorators import action
 from common.permissions import IsSafeOrPatch
+from django.db.models import Sum
 
 from . import models
 from . import serializers
diff --git a/src/images/models.py b/src/images/models.py
index b1f898eff7caef3d104727b343091ac4259653dd..cab2442d4eefa7e8d5200145ab567d911d12bffb 100644
--- a/src/images/models.py
+++ b/src/images/models.py
@@ -1,4 +1,7 @@
+import os
+
 from django.db import models
+from django.dispatch import receiver
 
 
 class Image(models.Model):
@@ -8,3 +11,10 @@ class Image(models.Model):
 
     def __str__(self):
         return str(self.id)
+
+# Deletes file from filesystem when File object is deleted.
+@receiver(models.signals.post_delete, sender=Image)
+def auto_delete_image_on_delete(sender, instance, **kwargs):
+    if instance.image:
+        if os.path.isfile(instance.image.path):
+            os.remove(instance.image.path)
diff --git a/src/kszkepzes/settings/base.py b/src/kszkepzes/settings/base.py
index b040f8cf02b11324711e2a19c152aac3bf7be47e..a1ce1fbb2401262f421c430fb38a57a5e41da32c 100644
--- a/src/kszkepzes/settings/base.py
+++ b/src/kszkepzes/settings/base.py
@@ -161,4 +161,4 @@ STATIC_URL = '/staticfiles/'
 STATIC_ROOT = os.path.join(BASE_DIR, "staticfiles")
 
 MEDIA_URL = "/mediafiles/"
-MEDIA_ROOT = os.path.join(BASE_DIR, "mediafiles")
\ No newline at end of file
+MEDIA_ROOT = os.path.join(BASE_DIR, "mediafiles")
diff --git a/src/mentors/models.py b/src/mentors/models.py
index 2d952636f4339c5b7eda7ff4c8cd5d96a3e3a0b8..21c9a8d88bce2a19c9635ea0b76971961d112218 100644
--- a/src/mentors/models.py
+++ b/src/mentors/models.py
@@ -1,5 +1,8 @@
+import os
+
 from django.db import models
 from account.models import Profile
+from django.dispatch import receiver
 
 
 class Mentor(models.Model):
@@ -16,3 +19,10 @@ class Mentor(models.Model):
 
     def __str__(self):
         return self.name
+
+# Deletes file from filesystem when File object is deleted.
+@receiver(models.signals.post_delete, sender=Mentor)
+def auto_delete_image_on_delete(sender, instance, **kwargs):
+    if instance.image:
+        if os.path.isfile(instance.image.path):
+            os.remove(instance.image.path)