Limiting Time Machines from taking over TC

I am using my 1TB TC for TM on two Macs and the rest for the Music library (250GB) ready use video (about 220GB) and my Photo Library (30GB)
I cannot see how to stop the TM from just trying to eat all the disk space.
Where do you set - they can use up to 250GB each?
I know it is there somewhere otherwise what's the point of using TC as a NAS if all the disk disappears?
Thanks

Unfortunately there is no such setting that I know of. I have seen mention of a workaround which is to create a 500gb disk image on the TC and then keep all of your other files on that disk image (NOT a sparseimage). This way 500gb is always taken up by the disk image, and TM will only have the remaining 500gb with work with. Admittedly this is not a very elegant solution, but one that should work. There is no way that I know of to allocate a certain space to each computer though. Of course you need to adjust the sizes to whatever works for you.

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