diff --git a/setup/setuputils.class.inc.php b/setup/setuputils.class.inc.php
index e45dd62c9..cc49bcdc5 100644
--- a/setup/setuputils.class.inc.php
+++ b/setup/setuputils.class.inc.php
@@ -897,9 +897,18 @@ class SetupUtils
 		return $f;
 	}
 
+    /**
+     * @param float $fBytes size in raw bytes, for example 162594750464.0
+     * @return string formatted string, for example "161.62 GB"
+     *
+     * @link https://en.wiktionary.org/wiki/byte byte and not Byte
+     * @link https://en.wikipedia.org/wiki/Kilobyte kB and not KB (IEC 80000-13)
+     * @link https://en.wiktionary.org/wiki/petabyte petabyte PB
+     * @link https://en.wiktionary.org/wiki/exabyte exabyte EB
+     */
 	public static function HumanReadableSize($fBytes)
 	{
-		$aSizes = array('bytes', 'Kb', 'Mb', 'Gb', 'Tb', 'Pb', 'Hb');
+		$aSizes = array('bytes', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB');
 		$index = 0;
 		while (($fBytes > 1000) && ($index < count($aSizes)))
 		{