diff --git a/migrations_lockfile.txt b/migrations_lockfile.txt
index ef2a091184c8..1e114eb2176b 100644
--- a/migrations_lockfile.txt
+++ b/migrations_lockfile.txt
@@ -31,7 +31,7 @@ replays: 0007_organizationmember_replay_access
 
 seer: 0017_drop_old_fk_columns
 
-sentry: 1114_extend_repository_url_length
+sentry: 1115_projectdebugfile_add_objectstore_columns
 
 social_auth: 0003_social_auth_json_field
 
diff --git a/src/sentry/api/endpoints/debug_files.py b/src/sentry/api/endpoints/debug_files.py
index d166be11d35e..ea4c88eb9c47 100644
--- a/src/sentry/api/endpoints/debug_files.py
+++ b/src/sentry/api/endpoints/debug_files.py
@@ -272,6 +272,7 @@ def download(self, debug_file_id, project: Project):
             raise Http404
 
         try:
+            assert debug_file.file is not None
             fp = debug_file.file.getfile()
             response = StreamingHttpResponse(
                 iter(lambda: fp.read(4096), b""), content_type="application/octet-stream"
diff --git a/src/sentry/migrations/1115_projectdebugfile_add_objectstore_columns.py b/src/sentry/migrations/1115_projectdebugfile_add_objectstore_columns.py
new file mode 100644
index 000000000000..c1004654f40d
--- /dev/null
+++ b/src/sentry/migrations/1115_projectdebugfile_add_objectstore_columns.py
@@ -0,0 +1,44 @@
+from django.db import migrations, models
+
+import sentry.db.models.fields.bounded
+import sentry.db.models.fields.foreignkey
+
+from sentry.new_migrations.migrations import CheckedMigration
+
+
+class Migration(CheckedMigration):
+    is_post_deployment = False
+
+    dependencies = [
+        ("sentry", "1114_extend_repository_url_length"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="projectdebugfile",
+            name="file",
+            field=sentry.db.models.fields.foreignkey.FlexibleForeignKey(
+                null=True, on_delete=models.PROTECT, to="sentry.file"
+            ),
+        ),
+        migrations.AddField(
+            model_name="projectdebugfile",
+            name="storage_path",
+            field=models.TextField(null=True),
+        ),
+        migrations.AddField(
+            model_name="projectdebugfile",
+            name="content_type",
+            field=models.TextField(null=True),
+        ),
+        migrations.AddField(
+            model_name="projectdebugfile",
+            name="file_size",
+            field=sentry.db.models.fields.bounded.BoundedBigIntegerField(null=True),
+        ),
+        migrations.AddField(
+            model_name="projectdebugfile",
+            name="date_created",
+            field=models.DateTimeField(null=True),
+        ),
+    ]
diff --git a/src/sentry/models/debugfile.py b/src/sentry/models/debugfile.py
index 79edf1560d37..ce2c0f6e7bf2 100644
--- a/src/sentry/models/debugfile.py
+++ b/src/sentry/models/debugfile.py
@@ -119,7 +119,8 @@ def find_by_debug_ids(
 class ProjectDebugFile(Model):
     __relocation_scope__ = RelocationScope.Excluded
 
-    file = FlexibleForeignKey("sentry.File", on_delete=models.PROTECT)
+    # When the migration to Objectstore is complete, this can be removed.
+    file = FlexibleForeignKey("sentry.File", null=True, on_delete=models.PROTECT)
     checksum = models.CharField(max_length=40, null=True, db_index=True)
     object_name = models.TextField()
     cpu_name = models.CharField(max_length=40)
@@ -129,6 +130,16 @@ class ProjectDebugFile(Model):
     data = LegacyTextJSONField(default=dict, null=True)
     date_accessed = models.DateTimeField(default=timezone.now, db_default=Now())
 
+    # The following fields are present if and only if the file is stored in Objectstore.
+    # Key of the file in Objectstore.
+    storage_path = models.TextField(null=True)
+    # Mirrors `file.headers["Content-Type"]` for files stored in Objectstore.
+    content_type = models.TextField(null=True)
+    # Mirrors `file.size` for files stored in Objectstore.
+    file_size = BoundedBigIntegerField(null=True)
+    # Mirrors `file.timestamp` for files stored in Objectstore.
+    date_created = models.DateTimeField(null=True)
+
     objects: ClassVar[ProjectDebugFileManager] = ProjectDebugFileManager()
 
     difcache: ClassVar[DIFCache]
@@ -145,6 +156,7 @@ class Meta:
 
     @property
     def file_format(self) -> str:
+        assert self.file is not None
         ct = self.file.headers.get("Content-Type", "unknown").lower()
         return KNOWN_DIF_FORMATS.get(ct, "unknown")
 
@@ -201,7 +213,8 @@ def delete(self, *args: Any, **kwargs: Any) -> tuple[int, dict[str, int]]:
         # row behind, but no surviving ProjectDebugFile should point to a deleted
         # File.
         try:
-            self.file.delete()
+            if self.file is not None:
+                self.file.delete()
         except ProtectedError:
             pass
 
@@ -224,6 +237,7 @@ def clean_redundant_difs(project: Project, debug_id: str) -> None:
     uuidmap_seen = False
     il2cpp_seen = False
     for i, dif in enumerate(difs):
+        assert dif.file is not None
         mime_type = dif.file.headers.get("Content-Type")
         if mime_type == DIF_MIMETYPES["bcsymbolmap"]:
             if not bcsymbolmap_seen:
@@ -733,6 +747,7 @@ def fetch_difs(
             except OSError as e:
                 if e.errno != errno.ENOENT:
                     raise
+                assert dif.file is not None
                 dif.file.save_to(dif_path)
             rv[debug_id] = dif_path
 
diff --git a/tests/sentry/tasks/test_assemble.py b/tests/sentry/tasks/test_assemble.py
index 4d12379d1980..3f55efc7dea0 100644
--- a/tests/sentry/tasks/test_assemble.py
+++ b/tests/sentry/tasks/test_assemble.py
@@ -92,6 +92,7 @@ def test_dif(self) -> None:
             project_id=self.project.id, checksum=total_checksum
         ).get()
 
+        assert dif.file is not None
         assert dif.file.headers == {"Content-Type": "text/x-breakpad"}
 
     def test_assemble_from_files(self) -> None:
@@ -203,6 +204,7 @@ def test_assemble_debug_id_override(self) -> None:
             project_id=self.project.id, checksum=total_checksum
         ).get()
 
+        assert dif.file is not None
         assert dif.file.headers == {"Content-Type": "text/x-breakpad"}
         assert dif.debug_id == "67e9247c-814e-392b-a027-dbde6748fcbf-beef"