backing up large directories in manageable chunks

Hello

Occasional Lurker, rarely posting on reddit.

The problem: 60+ Terabytes of data available over windows file sharing, that needs to be preserved once, and I don't have a contiguous 60+ Terabyte location to store it. Cloud storage is not an option and not my call.

So in my mind, a software solution that could assess the sources and dump them into a sequence of manageably-sized .iso or .dmg files would work. Preferably something that can be periodically paused while I move data to other storage or plug in another hard drive. I seem to recall that in ancient times, Retrospect on the Mac could do this. I'm looking for something that won't split files or directories, so each image file is self-contained and coherent.

I could consider a solution on Mac, Windows or Linux, especially if free, and especially if the end result was mountable and readable by Windows or Mac users. Is this something I could do with Veeam community edition? ddrescue? MacOS disk utility? I think the automation part is stumping me, as I don't want to have to stand by and monitor the copy.

Thank you...