I run a weekly full backup on Friday nights and differential backups nightly Monday - Thursday.  I use the Archive Bit to determine what files to back up instead of modified time.  I use backup to  disk folders and have a folder for every day of the week.  What I want to do is keep two days of differentials.  I want to keep two days because I start and go home earlier than the most of the staff, and I am often asked arrive Wednessday and find a note on my monitor asking me for a "clean" copy of the file a user mangled Tuesday afternoon.  So I want to erase  the Monday differential backup to disk file after the Wednessday night differntial job completes successfully.  This saves a little disk space and allows me to go home early.  I do this every morning manually now,  but I would like to automate the task with a post job command that only runs if the job is successful. I would also like to erase all the old differntials after a successful full back up is this possible, and can someone point me to the right place so I can learn how to do this.

I tried searching this forum before I I posted this question. I must be doing something wrong as I can't be the first one who has thought about Erasing Uneccessary Differential Backups when using a Backup to disk files as the primary backup media.

Thanks
Todd