diff --git a/docs/getting-started/deployment.md b/docs/getting-started/deployment.md
index d3d04cc..1df27b0 100644
--- a/docs/getting-started/deployment.md
+++ b/docs/getting-started/deployment.md
@@ -27,6 +27,7 @@ Wizard работает через меню с цифрами и подтвер
 - скачать выбранный compose-профиль (`Caddy`, `Nginx`, `Pangolin/Newt` или `no-proxy`);
 - сгенерировать минимальный `.env`, включая пароли и стабильные secrets;
 - сохранить backup существующих файлов перед перезаписью;
+- подготовить writable `data/` для файлов приложения;
 - запустить `docker compose pull && docker compose up -d`;
 - проверить текущий стек через `docker compose ps` и логи `migrate`;
 - запустить миграцию из поддерживаемых ботов: Remnashop и старый
diff --git a/scripts/install.sh b/scripts/install.sh
index bc7c57c..26274be 100644
--- a/scripts/install.sh
+++ b/scripts/install.sh
@@ -8,6 +8,8 @@ DEFAULT_REF="${MINISHOP_INSTALL_REF:-main}"
 DEFAULT_IMAGE_TAG="${MINISHOP_IMAGE_TAG:-latest}"
 INSTALL_STATE_DIR=".installer"
 IMPORTER_CACHE_PATH="$INSTALL_STATE_DIR/import_legacy.py"
+APP_UID=10001
+APP_GID=10001
 OLD_TGSHOP_DB_VOLUME="remnawave-tg-shop-db-data"
 NEW_MINISHOP_DB_VOLUME="remnawave-minishop-db-data"
 OLD_TGSHOP_CADDY_DATA_VOLUME="remnawave-tg-shop-caddy-data"
@@ -635,6 +637,37 @@ write_env_file() {
     ok "Wrote $ENV_PATH"
 }
 
+prepare_data_mount() {
+    section "Prepare data mount"
+    data_dir="$TARGET_DIR/data"
+    created=0
+    if [ ! -d "$data_dir" ]; then
+        mkdir -p "$data_dir" || return 1
+        created=1
+    fi
+
+    if [ "$created" = "1" ]; then
+        if command -v chown >/dev/null 2>&1; then
+            if ! chown "$APP_UID:$APP_GID" "$data_dir" 2>/dev/null; then
+                warn "Could not chown $data_dir. Run: sudo chown $APP_UID:$APP_GID data"
+            fi
+        fi
+        chmod u+rwx "$data_dir" 2>/dev/null || true
+        ok "Created writable $data_dir"
+        return 0
+    fi
+
+    info "$data_dir already exists."
+    if confirm "Adjust $data_dir owner to $APP_UID:$APP_GID for container writes?" 0; then
+        if command -v chown >/dev/null 2>&1; then
+            if ! chown "$APP_UID:$APP_GID" "$data_dir" 2>/dev/null; then
+                warn "Could not chown $data_dir. Run: sudo chown $APP_UID:$APP_GID data"
+            fi
+        fi
+        chmod u+rwx "$data_dir" 2>/dev/null || true
+    fi
+}
+
 require_docker() {
     if command -v docker >/dev/null 2>&1 && docker compose version >/dev/null 2>&1; then
         COMPOSE_STYLE="docker"
@@ -1049,6 +1082,7 @@ install_flow() {
     download_profile_files || return 1
     write_env_file || return 1
     mkdir -p "$TARGET_DIR/$INSTALL_STATE_DIR"
+    prepare_data_mount || return 1
     if [ "$with_migration" = "1" ]; then
         choose_legacy_source
     elif confirm "Run a migration from another bot now?" 0; then
@@ -1080,6 +1114,8 @@ migration_only_flow() {
     LEGACY_SOURCE=""
     installation_directory || return 1
     choose_legacy_source
+    [ "$LEGACY_SOURCE" = "skip" ] && return 0
+    prepare_data_mount || return 1
     case "$LEGACY_SOURCE" in
         remnashop)
             github_source || return 1
diff --git a/tests/test_install_script.py b/tests/test_install_script.py
index f69a83b..72a3b56 100644
--- a/tests/test_install_script.py
+++ b/tests/test_install_script.py
@@ -48,3 +48,15 @@ def test_shell_installer_supports_legacy_tgshop_volume_and_dsn_paths():
     assert "remnawave-minishop-db-data" in script
     assert "pg_dump --clean --if-exists" in script
     assert "run_compose run --rm migrate" in script
+
+
+def test_shell_installer_only_prepares_data_mount_not_runtime_content():
+    script = INSTALL_SCRIPT.read_text(encoding="utf-8")
+
+    assert 'data_dir="$TARGET_DIR/data"' in script
+    assert "mkdir -p \"$data_dir\"" in script
+    assert "chown \"$APP_UID:$APP_GID\" \"$data_dir\"" in script
+    assert "data_dir/themes" not in script
+    assert "webapp-logo" not in script
+    assert "webapp-emoji" not in script
+    assert "locales-overrides.json" not in script