diff --git a/examples/posix_fs/README.md b/examples/posix_fs/README.md
new file mode 100644
index 0000000..7f05bd4
--- /dev/null
+++ b/examples/posix_fs/README.md
@@ -0,0 +1,10 @@
+# POSIX file access example
+
+This example runs several file system tests on ESP8266.
+It uses fs-test library to perform file operations test. fs-test library uses
+only POSIX file functions so can be run on host system as well.
+
+Currently included tests:
+ * File system load test. Perform multiple file operations in random order.
+ * File system speed test. Measures files read/write speed.
+