If you have enabled e-mail notifications, Backup for Workgroups will send the System Administrator notices when it notices that the available free space on the Backup Server is running low. When your Backup Server is running low on available space you can:
Move your Backup Server to a computer with more disk space - OR -
Install a new hard drive and move your backup data to this new, larger hard drive - OR -
Install an additional, new hard drive to increase the overall storage of your Backup Server - OR -