Sparsedisk Image with Disk Utility
How do I make a sparse disk image with Disk Utility in Mac OS X Ventura?
How do I make a sparse disk image with Disk Utility in Mac OS X Ventura?
This might help lead you in the right direction. A previous Apple post about Sparse disks.
Disk images: Sparse vs. Sparse bundle? - Apple Community
Sparsedisk Image with Disk Utility