diff --git a/health/filesystem/1.0/IFileSystem.hal b/health/filesystem/1.0/IFileSystem.hal
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+++ b/health/filesystem/1.0/IFileSystem.hal
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.health.filesystem@1.0;
+
+/**
+ * IFileSystem is an interface that provides operations on underlying storage
+ * devices, including flash memory.
+ */
+interface IFileSystem {
+    /**
+     * Start garbage collection on the driver of storage devices. This function
+     * must be called at regular intervals when it is a good time for a
+     * longer-running cleanup tasks.
+     *
+     * @return result Execution result. See documentation for Result for
+     *     details.
+     */
+    garbageCollect() generates (Result result);
+};