diff --git a/src/solanaceae/message3/message_serializer.cpp b/src/solanaceae/message3/message_serializer.cpp
index 5d2baa7..d2cf197 100644
--- a/src/solanaceae/message3/message_serializer.cpp
+++ b/src/solanaceae/message3/message_serializer.cpp
@@ -2,6 +2,7 @@
 
 #include <solanaceae/message3/components.hpp>
 #include <solanaceae/contact/components.hpp>
+#include <solanaceae/object_store/meta_components.hpp>
 
 #include <nlohmann/json.hpp>
 
@@ -52,6 +53,37 @@ Contact3 MessageSerializerNJ::deserlContactByID(const nlohmann::json& j) {
 	return other_c;
 }
 
+nlohmann::json MessageSerializerNJ::serlFileObjByID(ObjectHandle o) const {
+	if (!o) {
+		std::cerr << "MSC warning: encountered invalid file object\n";
+		return nullptr;
+	}
+
+	auto* id_comp = o.try_get<ObjComp::ID>();
+	if (id_comp == nullptr || id_comp->v.empty()) {
+		std::cerr << "MSC warning: encountered file object without ID\n";
+		return nullptr; // throw instead??
+	}
+
+	return nlohmann::json::binary(id_comp->v);
+}
+
+ObjectHandle MessageSerializerNJ::deserlFileObjByID(const nlohmann::json& j) {
+	std::vector<uint8_t> id;
+	if (j.is_binary()) {
+		id = j.get_binary();
+	} else {
+		j["bytes"].get_to(id);
+	}
+
+	auto o = os.getOneObjectByID(ByteSpan{id});
+	if (!o) {
+		// TODO: create empty objet with id, others need to merge if it exist? special tag to prevent arb merging??
+	}
+
+	return o;
+}
+
 template<>
 bool MessageSerializerNJ::component_get_json<Message::Components::ContactFrom>(MessageSerializerNJ& msc, const Handle h, nlohmann::json& j) {
 	const Contact3 c = h.get<Message::Components::ContactFrom>().c;
@@ -154,3 +186,20 @@ bool MessageSerializerNJ::component_emplace_or_replace_json<Message::Components:
 	return true;
 }
 
+template<>
+bool MessageSerializerNJ::component_get_json<Message::Components::MessageFileObject>(MessageSerializerNJ& msc, const Handle h, nlohmann::json& j) {
+	const auto& comp = h.get<Message::Components::MessageFileObject>();
+
+	return false;
+}
+
+template<>
+bool MessageSerializerNJ::component_emplace_or_replace_json<Message::Components::MessageFileObject>(MessageSerializerNJ& msc, Handle h, const nlohmann::json& j) {
+	if (j.is_null()) {
+		std::cerr << "MSC warning: encountered null MessageFileObject\n";
+		h.emplace_or_replace<Message::Components::MessageFileObject>();
+		return true;
+	}
+
+	return false;
+}
diff --git a/src/solanaceae/message3/message_serializer.hpp b/src/solanaceae/message3/message_serializer.hpp
index b9b80ac..9d96cc4 100644
--- a/src/solanaceae/message3/message_serializer.hpp
+++ b/src/solanaceae/message3/message_serializer.hpp
@@ -4,6 +4,7 @@
 #include <entt/container/dense_map.hpp>
 
 #include <solanaceae/message3/registry_message_model.hpp>
+#include <solanaceae/object_store/object_store.hpp>
 
 #include <nlohmann/json_fwd.hpp>
 
@@ -14,6 +15,7 @@ struct MessageSerializerNJ {
 	static constexpr const char* version {"1"};
 
 	Contact3Registry& cr;
+	ObjectStore2& os;
 
 	// nlohmann
 	// json/msgpack
@@ -76,6 +78,8 @@ struct MessageSerializerNJ {
 	// helper
 	nlohmann::json serlContactByID(Contact3 c) const;
 	Contact3 deserlContactByID(const nlohmann::json& j);
+	nlohmann::json serlFileObjByID(ObjectHandle o) const;
+	ObjectHandle deserlFileObjByID(const nlohmann::json& j);
 };
 
 // fwd
@@ -83,6 +87,7 @@ namespace Message::Components {
 struct ContactFrom;
 struct ContactTo;
 struct ReceivedBy;
+struct MessageFileObject;
 }
 
 // make specializations known
@@ -98,3 +103,7 @@ template<>
 bool MessageSerializerNJ::component_get_json<Message::Components::ReceivedBy>(MessageSerializerNJ& msc, const Handle h, nlohmann::json& j);
 template<>
 bool MessageSerializerNJ::component_emplace_or_replace_json<Message::Components::ReceivedBy>(MessageSerializerNJ& msc, Handle h, const nlohmann::json& j);
+template<>
+bool MessageSerializerNJ::component_get_json<Message::Components::MessageFileObject>(MessageSerializerNJ& msc, const Handle h, nlohmann::json& j);
+template<>
+bool MessageSerializerNJ::component_emplace_or_replace_json<Message::Components::MessageFileObject>(MessageSerializerNJ& msc, Handle h, const nlohmann::json& j);
diff --git a/src/solanaceae/message3/nj/message_components.hpp b/src/solanaceae/message3/nj/message_components.hpp
index a9db939..c30872c 100644
--- a/src/solanaceae/message3/nj/message_components.hpp
+++ b/src/solanaceae/message3/nj/message_components.hpp
@@ -21,13 +21,7 @@ namespace Message::Components {
 	// SyncedBy
 
 	NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(MessageText, text)
-
-	// TODO: remove
-	//namespace Transfer {
-		//NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(FileInfo::FileDirEntry, file_name, file_size)
-		//NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(FileInfo, file_list, total_size)
-		//NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(FileInfoLocal, file_list)
-	//} // Transfer
+	// file is special
 
 } // Message::Components
 
diff --git a/src/solanaceae/message3/nj/message_components_serializer.cpp b/src/solanaceae/message3/nj/message_components_serializer.cpp
index 8d17269..fbdd4b0 100644
--- a/src/solanaceae/message3/nj/message_components_serializer.cpp
+++ b/src/solanaceae/message3/nj/message_components_serializer.cpp
@@ -27,13 +27,7 @@ void registerMessageComponents(MessageSerializerNJ& msnj) {
 	msnj.registerSerializer<Message::Components::TagMessageIsAction>();
 	msnj.registerDeserializer<Message::Components::TagMessageIsAction>();
 
-	// files
-	//_sc.registerSerializerJson<Message::Components::Transfer::FileID>()
-	//_sc.registerSerializerJson<Message::Components::Transfer::FileInfo>();
-	//_sc.registerDeSerializerJson<Message::Components::Transfer::FileInfo>();
-	//_sc.registerSerializerJson<Message::Components::Transfer::FileInfoLocal>();
-	//_sc.registerDeSerializerJson<Message::Components::Transfer::FileInfoLocal>();
-	//_sc.registerSerializerJson<Message::Components::Transfer::TagHaveAll>();
-	//_sc.registerDeSerializerJson<Message::Components::Transfer::TagHaveAll>();
+	msnj.registerSerializer<Message::Components::MessageFileObject>();
+	msnj.registerDeserializer<Message::Components::MessageFileObject>();
 }