We look at block vs file storage for contemporary workloads, and find it’s largely a case of trade-offs between cost, complexity and the level of performance you can settle for.
If you need to expand your Mac storage in a big way without breaking the bank, your best bet is with external hard drives.
Samsung's T9 SSD offers up to 4TB of storage with transfer speeds of up to 20Gbps - in an ultraportable form factor.