diff --git a/django_project/gap/migrations/0042_alter_datasourcefilecache_size.py b/django_project/gap/migrations/0042_alter_datasourcefilecache_size.py
new file mode 100644
index 00000000..72e06872
--- /dev/null
+++ b/django_project/gap/migrations/0042_alter_datasourcefilecache_size.py
@@ -0,0 +1,18 @@
+# Generated by Django 4.2.7 on 2024-12-15 19:08
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('gap', '0041_preferences_api_use_x_accel_redirect_and_more'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='datasourcefilecache',
+            name='size',
+            field=models.PositiveBigIntegerField(default=0),
+        ),
+    ]
diff --git a/django_project/gap/models/dataset.py b/django_project/gap/models/dataset.py
index da01193f..257be3e4 100644
--- a/django_project/gap/models/dataset.py
+++ b/django_project/gap/models/dataset.py
@@ -174,7 +174,7 @@ class DataSourceFileCache(models.Model):
         null=True,
         blank=True
     )
-    size = models.PositiveIntegerField(default=0)
+    size = models.PositiveBigIntegerField(default=0)
 
     class Meta:
         """Meta class for DataSourceFileCache."""
diff --git a/django_project/gap/models/preferences.py b/django_project/gap/models/preferences.py
index ebfc7616..d23ee41d 100644
--- a/django_project/gap/models/preferences.py
+++ b/django_project/gap/models/preferences.py
@@ -192,7 +192,7 @@ def user_file_s3_transfer_config() -> TransferConfig:
         conf = Preferences.load().user_file_uploader_config
         return TransferConfig(
             multipart_chunksize=(
-                conf.get('default_block_size', 500) * 1024 * 1024
+                conf.get('default_block_size', 500 * 1024 * 1024)
             ),
             use_threads=True,
             max_concurrency=(
diff --git a/django_project/gap_api/migrations/0006_alter_userfile_size.py b/django_project/gap_api/migrations/0006_alter_userfile_size.py
new file mode 100644
index 00000000..a4e32b41
--- /dev/null
+++ b/django_project/gap_api/migrations/0006_alter_userfile_size.py
@@ -0,0 +1,18 @@
+# Generated by Django 4.2.7 on 2024-12-15 19:08
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('gap_api', '0005_userfile'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='userfile',
+            name='size',
+            field=models.PositiveBigIntegerField(default=0),
+        ),
+    ]
diff --git a/django_project/gap_api/models/user_file.py b/django_project/gap_api/models/user_file.py
index ddb9d388..28da9080 100644
--- a/django_project/gap_api/models/user_file.py
+++ b/django_project/gap_api/models/user_file.py
@@ -38,7 +38,7 @@ class UserFile(models.Model):
         editable=False,
         blank=True
     )
-    size = models.IntegerField(default=0)
+    size = models.PositiveBigIntegerField(default=0)
 
     def _calculate_hash(self):
         """Calculate hash from query params."""