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Game installs, 4K video projects, and photo libraries keep getting larger, and a 4TB NVMe SSD is the clean answer to running out of space. At this capacity you can hold a huge Steam library, an OS, and years of creative work on a single fast drive, with no juggling of files between disks. The good news is that 4TB models are now mature and widely available in both PCIe 4.0 and blazing PCIe 5.0 flavors, so you can match capacity to the speed your motherboard supports.
Before spending on a bigger drive, it is worth clearing the clutter first — our guide on how to free up disk space in Windows shows which files are safe to remove.
Upgrading to make room for your game library? See our guide on how to move Steam games to another drive to migrate everything without redownloading.
Below are five 4TB NVMe SSDs that reviewers rank near the top for 2026, based on independent reviews from Tom’s Hardware and other hands-on testers. We cover the safest all-round PCIe 4.0 picks, the best gaming drive, and the fastest PCIe 5.0 options, noting sequential speeds and design for each. Before you install one, see our guides to the best PCIe 5.0 SSDs for gaming, M.2 SSD heatsinks, and how to install an M.2 NVMe SSD.
Frequently asked questions
Is a PCIe 4.0 or PCIe 5.0 4TB SSD better?
It depends on your motherboard and needs. PCIe 5.0 drives like the Samsung 9100 Pro offer much higher sequential speeds but require a PCIe 5.0 slot and benefit from good cooling. For most gaming and everyday use, a fast PCIe 4.0 drive such as the 990 Pro feels virtually identical while costing less and running cooler. Choose Gen 5 mainly for heavy large-file workloads.
Do 4TB NVMe SSDs need a heatsink?
High-speed drives, especially PCIe 5.0 models, can benefit from a heatsink to avoid thermal throttling during sustained transfers. Many motherboards include M.2 heatsinks, and some SSDs ship with their own. For a typical PCIe 4.0 drive in a well-ventilated case, the board’s heatsink is usually enough. For Gen 5 drives, active or larger cooling is recommended.
Are single-sided or double-sided SSDs better?
Single-sided drives, like the Samsung 990 Pro at 4TB, place all chips on one side, which helps them fit in thin laptops and consoles with tight clearance. Double-sided drives, such as the 4TB WD SN850X, are fine in most desktops. Check your device’s clearance if you plan to install a 4TB drive in a laptop or handheld.
Is 4TB overkill for a gaming PC?
Not anymore. Modern games can exceed 100GB each, so a large library fills space quickly. A 4TB drive lets you keep many titles installed alongside your OS and other files without constant uninstalling. If you also record video or store large media, 4TB provides comfortable headroom and reduces the need for a second drive.
