diff --git a/simplex-chat.cabal b/simplex-chat.cabal
index 7de66a5bd6..2798a29f71 100644
--- a/simplex-chat.cabal
+++ b/simplex-chat.cabal
@@ -88,6 +88,7 @@ library
       Simplex.Chat.Migrations.M20230317_hidden_profiles
       Simplex.Chat.Migrations.M20230318_file_description
       Simplex.Chat.Migrations.M20230321_agent_file_deleted
+      Simplex.Chat.Migrations.M20230328_files_protocol
       Simplex.Chat.Mobile
       Simplex.Chat.Mobile.WebRTC
       Simplex.Chat.Options
diff --git a/src/Simplex/Chat/Migrations/M20230328_files_protocol.hs b/src/Simplex/Chat/Migrations/M20230328_files_protocol.hs
new file mode 100644
index 0000000000..5690378301
--- /dev/null
+++ b/src/Simplex/Chat/Migrations/M20230328_files_protocol.hs
@@ -0,0 +1,18 @@
+{-# LANGUAGE QuasiQuotes #-}
+
+module Simplex.Chat.Migrations.M20230328_files_protocol where
+
+import Database.SQLite.Simple (Query)
+import Database.SQLite.Simple.QQ (sql)
+
+m20230328_files_protocol :: Query
+m20230328_files_protocol =
+  [sql|
+ALTER TABLE files ADD COLUMN protocol TEXT NOT NULL DEFAULT 'smp';
+|]
+
+down_m20230328_files_protocol :: Query
+down_m20230328_files_protocol =
+  [sql|
+ALTER TABLE files DROP COLUMN protocol;
+|]
diff --git a/src/Simplex/Chat/Migrations/chat_schema.sql b/src/Simplex/Chat/Migrations/chat_schema.sql
index ed1b303545..4fc96eb5dc 100644
--- a/src/Simplex/Chat/Migrations/chat_schema.sql
+++ b/src/Simplex/Chat/Migrations/chat_schema.sql
@@ -200,7 +200,8 @@ CREATE TABLE files(
   file_inline TEXT,
   agent_snd_file_id BLOB NULL,
   private_snd_file_descr TEXT NULL,
-  agent_snd_file_deleted INTEGER DEFAULT 0 CHECK(agent_snd_file_deleted NOT NULL)
+  agent_snd_file_deleted INTEGER DEFAULT 0 CHECK(agent_snd_file_deleted NOT NULL),
+  protocol TEXT NOT NULL DEFAULT 'smp'
 );
 CREATE TABLE snd_files(
   file_id INTEGER NOT NULL REFERENCES files ON DELETE CASCADE,
diff --git a/src/Simplex/Chat/Store.hs b/src/Simplex/Chat/Store.hs
index 1d45e2fe92..becdcbb45f 100644
--- a/src/Simplex/Chat/Store.hs
+++ b/src/Simplex/Chat/Store.hs
@@ -363,6 +363,7 @@ import Simplex.Chat.Migrations.M20230303_group_link_role
 import Simplex.Chat.Migrations.M20230317_hidden_profiles
 import Simplex.Chat.Migrations.M20230318_file_description
 import Simplex.Chat.Migrations.M20230321_agent_file_deleted
+import Simplex.Chat.Migrations.M20230328_files_protocol
 import Simplex.Chat.Protocol
 import Simplex.Chat.Types
 import Simplex.Chat.Util (week)
@@ -432,7 +433,8 @@ schemaMigrations =
     ("20230303_group_link_role", m20230303_group_link_role, Nothing),
     ("20230317_hidden_profiles", m20230317_hidden_profiles, Just down_m20230317_hidden_profiles),
     ("20230318_file_description", m20230318_file_description, Just down_m20230318_file_description),
-    ("20230321_agent_file_deleted", m20230321_agent_file_deleted, Just down_m20230321_agent_file_deleted)
+    ("20230321_agent_file_deleted", m20230321_agent_file_deleted, Just down_m20230321_agent_file_deleted),
+    ("20230328_files_protocol", m20230328_files_protocol, Just down_m20230328_files_protocol)
   ]
 
 -- | The list of migrations in ascending order by date
diff --git a/tests/ChatTests/Files.hs b/tests/ChatTests/Files.hs
index 2f2d937444..9d631838d8 100644
--- a/tests/ChatTests/Files.hs
+++ b/tests/ChatTests/Files.hs
@@ -50,6 +50,7 @@ chatFileTests = do
     xit "send and receive file to group, fully asynchronous" testAsyncGroupFileTransfer
   describe "file transfer over XFTP" $ do
     it "send and receive file" testXFTPFileTransfer
+    it "send and receive file in group" testXFTPGroupFileTransfer
     it "with changed XFTP config: send and receive file" testXFTPWithChangedConfig
     it "with relative paths: send and receive file" testXFTPWithRelativePaths
     it "continue receiving file after restart" testXFTPContinueRcv
@@ -943,6 +944,47 @@ testXFTPFileTransfer =
   where
     cfg = testCfg {xftpFileConfig = Just $ XFTPFileConfig {minFileSize = 0}, tempDir = Just "./tests/tmp"}
 
+testXFTPGroupFileTransfer :: HasCallStack => FilePath -> IO ()
+testXFTPGroupFileTransfer =
+  testChatCfg3 cfg aliceProfile bobProfile cathProfile $ \alice bob cath -> do
+    withXFTPServer $ do
+      createGroup3 "team" alice bob cath
+
+      alice #> "/f #team ./tests/fixtures/test.pdf"
+      alice <## "use /fc 1 to cancel sending"
+      concurrentlyN_
+        [ do
+            bob <# "#team alice> sends file test.pdf (266.0 KiB / 272376 bytes)"
+            bob <## "use /fr 1 [<dir>/ | <path>] to receive it",
+          do
+            cath <# "#team alice> sends file test.pdf (266.0 KiB / 272376 bytes)"
+            cath <## "use /fr 1 [<dir>/ | <path>] to receive it"
+        ]
+      -- alice <## "started sending file 1 (test.pdf) to bob" -- TODO "started uploading" ?
+      -- alice <## "completed sending file 1 (test.pdf) to bob" -- TODO "completed uploading" ?
+
+      bob ##> "/fr 1 ./tests/tmp"
+      bob
+        <### [ "saving file 1 from alice to ./tests/tmp/test.pdf",
+               "started receiving file 1 (test.pdf) from alice"
+             ]
+      bob <## "completed receiving file 1 (test.pdf) from alice"
+
+      cath ##> "/fr 1 ./tests/tmp"
+      cath
+        <### [ "saving file 1 from alice to ./tests/tmp/test_1.pdf",
+               "started receiving file 1 (test.pdf) from alice"
+             ]
+      cath <## "completed receiving file 1 (test.pdf) from alice"
+
+      src <- B.readFile "./tests/fixtures/test.pdf"
+      dest1 <- B.readFile "./tests/tmp/test.pdf"
+      dest2 <- B.readFile "./tests/tmp/test_1.pdf"
+      dest1 `shouldBe` src
+      dest2 `shouldBe` src
+  where
+    cfg = testCfg {xftpFileConfig = Just $ XFTPFileConfig {minFileSize = 0}, tempDir = Just "./tests/tmp"}
+
 testXFTPWithChangedConfig :: HasCallStack => FilePath -> IO ()
 testXFTPWithChangedConfig =
   testChatCfg2 cfg aliceProfile bobProfile $ \alice bob -> do