diff --git a/internal/server/api_files.go b/internal/server/api_files.go
index 1c58cea..daf0918 100644
--- a/internal/server/api_files.go
+++ b/internal/server/api_files.go
@@ -198,6 +198,11 @@ func (s *Server) requireFileAccess(ctx context.Context, rawFileID string, user *
 
 // saveUpload пишет файл на диск и регистрирует его в БД.
 func (s *Server) saveUpload(ctx context.Context, file store.File, content io.Reader) (*store.File, error) {
+	if s.cfg.DataDir == "" {
+		// Без каталога данных файл некуда положить: лучше явная ошибка, чем
+		// запись в текущий рабочий каталог процесса.
+		return nil, humaErrorStatus(http.StatusInternalServerError, "internal.error", "data directory is not configured")
+	}
 	directory := filepath.Join(s.cfg.DataDir, "files")
 	if err := os.MkdirAll(directory, 0o700); err != nil {
 		return nil, humaErrorStatus(http.StatusInternalServerError, "internal.error", "cannot prepare storage")
diff --git a/internal/server/files/94894031435202560 b/internal/server/files/94894031435202560
deleted file mode 100644
index c717552..0000000
--- a/internal/server/files/94894031435202560
+++ /dev/null
@@ -1 +0,0 @@
-вложение: проверка загрузки
\ No newline at end of file
diff --git a/internal/server/files/94894082492465152 b/internal/server/files/94894082492465152
deleted file mode 100644
index c717552..0000000
--- a/internal/server/files/94894082492465152
+++ /dev/null
@@ -1 +0,0 @@
-вложение: проверка загрузки
\ No newline at end of file
diff --git a/internal/server/files/94894120186675200 b/internal/server/files/94894120186675200
deleted file mode 100644
index c717552..0000000
--- a/internal/server/files/94894120186675200
+++ /dev/null
@@ -1 +0,0 @@
-вложение: проверка загрузки
\ No newline at end of file
diff --git a/internal/server/files/94894120199258112 b/internal/server/files/94894120199258112
deleted file mode 100644
index c717552..0000000
--- a/internal/server/files/94894120199258112
+++ /dev/null
@@ -1 +0,0 @@
-вложение: проверка загрузки
\ No newline at end of file
diff --git a/internal/server/files/94894158157709312 b/internal/server/files/94894158157709312
deleted file mode 100644
index c717552..0000000
--- a/internal/server/files/94894158157709312
+++ /dev/null
@@ -1 +0,0 @@
-вложение: проверка загрузки
\ No newline at end of file
diff --git a/internal/server/files/94894158166097920 b/internal/server/files/94894158166097920
deleted file mode 100644
index c717552..0000000
--- a/internal/server/files/94894158166097920
+++ /dev/null
@@ -1 +0,0 @@
-вложение: проверка загрузки
\ No newline at end of file
diff --git a/internal/server/files/94894189732429824 b/internal/server/files/94894189732429824
deleted file mode 100644
index c717552..0000000
--- a/internal/server/files/94894189732429824
+++ /dev/null
@@ -1 +0,0 @@
-вложение: проверка загрузки
\ No newline at end of file
diff --git a/internal/server/files/94894189753401344 b/internal/server/files/94894189753401344
deleted file mode 100644
index c717552..0000000
--- a/internal/server/files/94894189753401344
+++ /dev/null
@@ -1 +0,0 @@
-вложение: проверка загрузки
\ No newline at end of file
diff --git a/internal/server/files/94894341939527680 b/internal/server/files/94894341939527680
deleted file mode 100644
index c717552..0000000
--- a/internal/server/files/94894341939527680
+++ /dev/null
@@ -1 +0,0 @@
-вложение: проверка загрузки
\ No newline at end of file
diff --git a/internal/server/files/94894341952110592 b/internal/server/files/94894341952110592
deleted file mode 100644
index c717552..0000000
--- a/internal/server/files/94894341952110592
+++ /dev/null
@@ -1 +0,0 @@
-вложение: проверка загрузки
\ No newline at end of file
diff --git a/internal/server/files/94894465700855808 b/internal/server/files/94894465700855808
deleted file mode 100644
index c717552..0000000
--- a/internal/server/files/94894465700855808
+++ /dev/null
@@ -1 +0,0 @@
-вложение: проверка загрузки
\ No newline at end of file
diff --git a/internal/server/files/94894465721827328 b/internal/server/files/94894465721827328
deleted file mode 100644
index c717552..0000000
--- a/internal/server/files/94894465721827328
+++ /dev/null
@@ -1 +0,0 @@
-вложение: проверка загрузки
\ No newline at end of file
diff --git a/internal/server/files/94896017563975680 b/internal/server/files/94896017563975680
deleted file mode 100644
index c717552..0000000
--- a/internal/server/files/94896017563975680
+++ /dev/null
@@ -1 +0,0 @@
-вложение: проверка загрузки
\ No newline at end of file
diff --git a/internal/server/files/94896017584947200 b/internal/server/files/94896017584947200
deleted file mode 100644
index c717552..0000000
--- a/internal/server/files/94896017584947200
+++ /dev/null
@@ -1 +0,0 @@
-вложение: проверка загрузки
\ No newline at end of file
diff --git a/internal/server/server_test.go b/internal/server/server_test.go
index d26ecf5..2964459 100644
--- a/internal/server/server_test.go
+++ b/internal/server/server_test.go
@@ -40,6 +40,9 @@ func newTestServer(t *testing.T) (*Server, *database.DB) {
 	})
 
 	cfg := config.Config{
+		// Данные (в том числе загруженные файлы) — во временном каталоге,
+		// иначе тесты пишут в рабочее дерево репозитория.
+		DataDir:           t.TempDir(),
 		Domain:            "gl.mhspx.su",
 		WebRoot:           filepath.Join("testdata", "web"),
 		FilesDomain:       "files.gl.mhspx.su",