The Sabrent Rocket Q4 (starts at $159.99 for 1TB; $749.99 for 4TB as tested) is not the highest-capacity internal SSD we have reviewed—that distinction belongs to the 8GB Sabrent Rocket Q—but it gives you far more storage space than typical M.2 solid-state drives, which seldom exceed 2TB. In testing the 4TB version, the Q4 proved true to its sizzling read and write speed ratings over a PCI Express 4.0 bus, although it couldn't keep up with the Samsung SSD 980 Pro, our Editors' Choice high-end internal SSD on PCIe 4.0. Still, it's a decent alternative on this fast new bus for folks who don't write tens of gigabytes of data a day.