diff --git a/proto/device_sync/device_sync.proto b/proto/device_sync/device_sync.proto
index 4fede5e..e8c1498 100644
--- a/proto/device_sync/device_sync.proto
+++ b/proto/device_sync/device_sync.proto
@@ -7,8 +7,22 @@ import "device_sync/consent_backup.proto";
 
 message BackupElement {
   oneof element {
-    xmtp.device_sync.group_backup.GroupSave group = 1;
-    xmtp.device_sync.message_backup.GroupMessageSave group_message = 2;
-    xmtp.device_sync.consent_backup.ConsentSave consent = 3;
+    BackupMetadata metadata = 1;
+    xmtp.device_sync.group_backup.GroupSave group = 2;
+    xmtp.device_sync.message_backup.GroupMessageSave group_message = 3;
+    xmtp.device_sync.consent_backup.ConsentSave consent = 4;
   }
 }
+
+message BackupMetadata {
+  uint32 backup_version = 1;
+  repeated BackupElementSelection elements = 2;
+  int64 exported_at_ns = 3;
+  optional int64 start_ns = 4;
+  optional int64 end_ns = 5;
+}
+
+enum BackupElementSelection {
+  BACKUP_ELEMENT_SELECTION_MESSAGES = 0;
+  BACKUP_ELEMENT_SELECTION_CONSENT = 1;
+}