This is causing an issue when trying to copy backups off to another location, specifically a mirror of the folder. Instead of renaming every file 1-300 and keeping the most current one at 1, could it just be a timestamp? The issue is if you mirror the folder to another location off of the server, it re-copies every file every time because of the name change. When your backups are over 1GB each and you have 300, You are re-copying 300GB of data every time you want to sync off the server, instead of just the new backup files.
Please consider this.
Thanks!