Not sure if this is what you're looking for, but if not please provide more info (OS, backup prog etc):
http://support.microsoft.com/default...;en-us;Q315688

Thanks but not quite what I was looking for. Windows only lets you use approx 10% of your hard drive space for backup files even if there is nothing else on it and even if you have multiple drives. How can I increase the amount of space allowed for backup files?

Are you talking about Windows Me and XP's system restore feature (which by default uses about 10% per drive as "back-up"?)

No. I'm refering to the use of Windows backup program (start-programs-accessories-systems tools-backup in Win 2K)when backing up one hard disk to another. Actually, I think this applies to other baqckup software as well. When backing up to another hard drive, Windows limits the amount of space available for those backup files to approximately 10% of the receiving hard drive. i.e. Recently I tried to back up approx 5 gig of data to a 40 gig hard drive which had very little data on it. When the program reached approx 4 gig of data, it announced that the hard drive was full and that I needed to insert new media to continue. This is not the first time that I have encountered this situation. Any suggestions?

this may be of help http://support.microsoft.com/default...;en-us;Q250651
8)

Thanks for the help. The articles you referenced helped to explain why. Unfortunately, they do not give a way to alter or change the 4 gig limitation. It's hard to understand why Microsoft would perpetuate this limitation throughout the continuing devolpment of the OS. With todays spacious hard drives, it only seems natural to use one as a backup medium; much faster and much more space than tape. You wouldn't by chance know of a way to overcome the 4 gig limitation would you?

Phil Richardson

I read the link aeinstien posted, it does tell you how to get around the situation: run multiple backup threads. If you don't know how to do that do a search on Microsoft's website under Support/Knowledge Base targeting Windows 2000 and search for "backup" - you'll get 150 replies. If you don't have the patience to scan through the listing try focusing the search with backup wizard and/or backup command line keywords. Asking for assistance is kewl, asking to be spoonfeed is not.

I also read how to get around the problem by using multiple backup threads. What I asked for in my previous post was for a lead to a way to alter or change the 4 gig limitation, not get around it nor to be spoonfed. At one time, I remember seeing a reference to this. Perhaps they were refering to multiple backups.
I may have to resort to running multiple backups, but it may be a bit cumbersome for my use. I work in a small office and I want to be able to rapidly back up 5 different computers without going to great expense such as would be necessary with a large tape unit or multipe tape units. Besides, multiple tape units adds the complexity of relying on multipe users to change tapes and verify that backups were completed or require that I have to spend the additional time to do this.

Ok, so why didn't you say all that to begin with? Both myself and TechTalkGirl asked you for more information - this was the kind of information need in order to try to help troubleshoot a problem. Next time when someone ask for more info please try to be more specific.