From 4ae1388cae12f279370869603f6c203eebb956ed Mon Sep 17 00:00:00 2001
From: Alex Zolotarev <deathbaba@users.noreply.github.com>
Date: Sun, 28 May 2017 13:38:48 +0300
Subject: [PATCH] Update README.md

---
 README.md | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index b2b89e6..4e1464c 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,9 @@
-# sd-card-speed-test
-Bash script for Mac OS X and Linux to test SD card or SSD/HDD read and write speed.
+# Test read/write speed of SD/microSD/USB/SSD/HDD.
+Bash script for Mac OS X and Linux to test SD/microSD card or SSD/HDD/USB drive read and write speed.
+
+Usage:
+```
+$ bash sd_card_speed_test.sh <path to directory which should be tested>
+```
+
+Note: administrator password is necessary for sudo to reset file system cache. Read speed result is incorrect without cache reset.