diff --git a/rotate.sh b/rotate.sh
index 99d2fc2..39d4046 100644
--- a/rotate.sh
+++ b/rotate.sh
@@ -1,6 +1,7 @@
 #!/bin/bash
 
-# Author: Marcello Torchio
+# Authors: Marcello Torchio, Will Bradley
+# https://github.com/zyphlar/backup-rotation-script
 
 # Set the directory name that you wish to backup
 DIRTOBACKUP=$1
@@ -8,28 +9,38 @@ DIRTOBACKUP=$1
 # Set up the backup destination directory
 BACKUPDIRDEST=$2
 
-# Set up the number of days for backup rotation
+# Set up the number of days for backup rotation (archives older than these # of days ago will be deleted)
 NUMDAYS=7;
 
-# Start logging
-echo "["$(date)"] - Started Backup"
-# Check if the destination dir exists. If not create it
-if [ ! -d "$BACKUPDIRDEST/"$(date +"%m-%d-%Y")"/" ]; then
-    # Creates directory for today's backup
-    mkdir $BACKUPDIR/"$(date +"%m-%d-%Y")"
+# Check for input / help / usage
+if [ -z "$2" ]
+  then
+    echo "Usage: ./rotate.sh source_folder destination_folder"
+else
+
+  # Start logging
+  echo "["$(date)"] - Started Backup"
+  # Check if the destination dir exists. If not create it
+  if [ ! -d "$BACKUPDIRDEST/"$(date +"%m-%d-%Y")"/" ]; then
+      # Creates directory for today's backup
+      mkdir $BACKUPDIRDEST/"$(date +"%m-%d-%Y")"
+  fi
+
+  # Echo the log line.
+  echo "["$(date)"] - Backup directory $DIRTOBACKUP in $BACKUPDIRDEST/"$(date +"%m-%d-%Y")"/"
+  # Execute the backup command. This backup consist in a recursive copy of the source dir into destination dir
+  cp -R $DIRTOBACKUP $BACKUPDIRDEST/"$(date +"%m-%d-%Y")"/
+
+  TOTMB=$(du $BACKUPDIRDEST/"$(date +"%m-%d-%Y")"/ -hs)
+  echo "["$(date)"] - Finished Backup - $TOTMB Copied"
+
+  # Search for folders older than NUMDAYS days and remove them. This makes possible rotation of backups
+  if [ "$BACKUPDIRDEST" != "" ]; then
+    for i in `find $BACKUPDIRDEST/ -maxdepth 1 -type d -mtime +$NUMDAYS -print`;
+    do
+        echo -e "["$(date)"] - Found backup folder from $(stat -c %y $i)! Deleting directory $i";
+        #\rm -rf $i;
+    done
+  fi
+
 fi
-
-# Echo the log line.
-echo "["$(date)"] - Backup directory $DIRTOBACKUP in $BACKUPDIRDEST/"$(date +"%m-%d-%Y")"/"
-# Execute the backup command. This backup consist in a recursive copy of the source dir into destination dir
-cp -R $DIRTOBACKUP $BACKUPDIRDEST/"$(date +"%m-%d-%Y")"/
-
-TOTMB=$(du $BACKUPDIRDEST/"$(date +"%m-%d-%Y")"/ -hs)
-echo "["$(date)"] - Finished Backup - $TOTMB Copied"
-
-# Search for folders older than NUMDAYS days and remove them. This makes possible rotation of backups
-for i in `find $BACKUPDIRDEST/ -maxdepth 1 -type d -mtime +$NUMDAYS -print`;
-do
-        echo -e "["$(date)"] - Found outdated backup folder! Deleting directory $i";
-        \rm -rf $i;
-done