diff --git a/admin/class-system-dashboard-admin.php b/admin/class-system-dashboard-admin.php
index dbd7f02..0d47d4e 100644
--- a/admin/class-system-dashboard-admin.php
+++ b/admin/class-system-dashboard-admin.php
@@ -1325,7 +1325,7 @@ public function is_exec_enabled() {
 	 * @since 1.0.0
 	 */
 	public function sd_format_filesize($bytes)	{
-		if ( is_numeric( $kiloBytes ) ) {
+		if ( is_numeric( $bytes ) ) {
 			if (($bytes / pow(1024, 5)) > 1) {
 				return number_format_i18n(($bytes / pow(1024, 5)), 0) . ' PB';
 			} elseif (($bytes / pow(1024, 4)) > 1) {
@@ -1785,7 +1785,7 @@ public function sd_ram_buffer() {
 
 		}
 
-		if ( ! is_null( $total_ram ) ) {
+		if ( ! is_null( $ram_buffer ) ) {
 
 			return trim($ram_buffer);