diff --git a/html/inc/bu-common.php b/html/inc/bu-common.php
index c21a667..70a8a0f 100644
--- a/html/inc/bu-common.php
+++ b/html/inc/bu-common.php
@@ -95,6 +95,16 @@
 	$bu_type = $row[4];
 	$bu_rnng = $row[5];
 
+	// To ensure uniqueness, we add the backup ID on the end of the path as a subdirectory.	
+	$bu_dest = "$bu_dest/bu_$buid";
+
+	// Make sure that the directory exists
+	if( !file_exists($bu_dest) ) {
+		if( false===mkdir( $bu_dest, 0777, true )){
+			return "Failed to create directory $bu_dest";
+		}
+	}
+	
 	// NOTE:
 	// using pcntl_fork() was a waste of time because the parent always waited for the child to finish.
 	// so we rely on bash &