I use this plugin for several of my client's sites and it's been fabulous, thank you.
However, recently, I've had trouble with several sites where, despite configuring it to only save 3 or 4 backups, the directory on the server is filling up with backups and causing the sites to exceed their disk quotas. While this is happening, the BackupWordpress interface is only showing the number of backups I've asked it to save.
In case this is relevant, I usually choose my own backup folder outside the standard httdocs folder, and use the following code in my wpconfig file:
define( 'HMBKP_PATH', '/home/pathtobackupdir/backupdir' );
Any help gratefully received.