diff --git a/external/solanaceae_object_store b/external/solanaceae_object_store
index 18d2888..e5b3546 160000
--- a/external/solanaceae_object_store
+++ b/external/solanaceae_object_store
@@ -1 +1 @@
-Subproject commit 18d2888e3452074245375f329d90520ac250b595
+Subproject commit e5b3546292c906da4680f838c235e3464476917b
diff --git a/external/solanaceae_tox b/external/solanaceae_tox
index 09300c1..d91ad4b 160000
--- a/external/solanaceae_tox
+++ b/external/solanaceae_tox
@@ -1 +1 @@
-Subproject commit 09300c1702f9bfb4cc857b904da33d51a94e0fe3
+Subproject commit d91ad4bfa922e729b690e68858a5f48468f3b8fa
diff --git a/src/chat_gui4.cpp b/src/chat_gui4.cpp
index 0599ffe..5d7159b 100644
--- a/src/chat_gui4.cpp
+++ b/src/chat_gui4.cpp
@@ -1318,7 +1318,7 @@ void ChatGui4::renderMessageBodyFile(Message3Registry& reg, const Message3 e) {
 		// deploy dummy of framedim size and check visibility
 		// +2 for border
 		ImGui::Dummy(ImVec2{width+2, height+2});
-		if (ImGui::IsItemVisible() && o.all_of<ObjComp::F::TagLocalHaveAll, ObjComp::F::SingleInfo, ObjComp::Ephemeral::Backend>()) {
+		if (ImGui::IsItemVisible() && o.all_of<ObjComp::F::TagLocalHaveAll, ObjComp::F::SingleInfo, ObjComp::Ephemeral::BackendFile2>()) {
 			ImGui::SetCursorPos(orig_curser_pos); // reset for actual img
 
 			auto [id, img_width, img_height] = _msg_tc.get(Message3Handle{reg, e});
diff --git a/src/media_meta_info_loader.cpp b/src/media_meta_info_loader.cpp
index 93939c8..fd2bdc9 100644
--- a/src/media_meta_info_loader.cpp
+++ b/src/media_meta_info_loader.cpp
@@ -45,8 +45,8 @@ void MediaMetaInfoLoader::handleMessage(const Message3Handle& m) {
 		return; // we dont have all data
 	}
 
-	if (!o.all_of<ObjComp::Ephemeral::Backend, ObjComp::F::SingleInfo>()) {
-		std::cerr << "MMIL error: object missing backend/file info (?)\n";
+	if (!o.all_of<ObjComp::Ephemeral::BackendFile2, ObjComp::F::SingleInfo>()) {
+		std::cerr << "MMIL error: object missing file backend/file info (?)\n";
 		return;
 	}
 
@@ -68,14 +68,14 @@ void MediaMetaInfoLoader::handleMessage(const Message3Handle& m) {
 		return;
 	}
 
-	auto* file_backend = o.get<ObjComp::Ephemeral::Backend>().ptr;
+	auto* file_backend = o.get<ObjComp::Ephemeral::BackendFile2>().ptr;
 	if (file_backend == nullptr) {
 		std::cerr << "MMIL error: object backend nullptr\n";
 		return;
 	}
 
 
-	auto file2 = file_backend->file2(o, StorageBackendI::FILE2_READ);
+	auto file2 = file_backend->file2(o, StorageBackendIFile2::FILE2_READ);
 	if (!file2 || !file2->isGood() || !file2->can_read) {
 		std::cerr << "MMIL error: creating file2 from object via backendI\n";
 		return;
diff --git a/src/message_image_loader.cpp b/src/message_image_loader.cpp
index b8ca579..a1971db 100644
--- a/src/message_image_loader.cpp
+++ b/src/message_image_loader.cpp
@@ -45,8 +45,8 @@ TextureLoaderResult MessageImageLoader::load(TextureUploaderI& tu, Message3Handl
 		return {std::nullopt};
 	}
 
-	if (!o.all_of<ObjComp::Ephemeral::Backend, ObjComp::F::SingleInfo>()) {
-		std::cerr << "MIL error: object missing backend (?)\n";
+	if (!o.all_of<ObjComp::Ephemeral::BackendFile2, ObjComp::F::SingleInfo>()) {
+		std::cerr << "MIL error: object missing file backend (?)\n";
 		return {std::nullopt};
 	}
 
@@ -68,13 +68,13 @@ TextureLoaderResult MessageImageLoader::load(TextureUploaderI& tu, Message3Handl
 		return {std::nullopt};
 	}
 
-	auto* file_backend = o.get<ObjComp::Ephemeral::Backend>().ptr;
+	auto* file_backend = o.get<ObjComp::Ephemeral::BackendFile2>().ptr;
 	if (file_backend == nullptr) {
 		std::cerr << "MIL error: object backend nullptr\n";
 		return {std::nullopt};
 	}
 
-	auto file2 = file_backend->file2(o, StorageBackendI::FILE2_READ);
+	auto file2 = file_backend->file2(o, StorageBackendIFile2::FILE2_READ);
 	if (!file2 || !file2->isGood() || !file2->can_read) {
 		std::cerr << "MIL error: creating file2 from object via backendI\n";
 		return {std::nullopt};