Every 4TB SSD we track — NVMe, SATA and external — ranked by price per terabyte. 4TB is usually the best $/TB of any capacity, and the numbers below show why. 16 drives compared. Updated July 31, 2026.
Cheapest 4TB SSD: Crucial BX500 4TB — $95.67/TB ($382.66 total)
Why 4TB: the fixed cost of controller and board is spread over more NAND, so $/TB is typically the lowest of any single-drive capacity
The 8TB catch: jumping to 8TB usually costs more per TB, so two 4TB drives almost always beat one 8TB drive for the same total space — if you have two slots
Last checked July 31, 2026. Prices come from Amazon US and are refreshed every day; $/TB is the listing price divided by raw capacity. Full methodology.
| $/TB | $/GB | Price | Lowest seen | Capacity | Interface | Gen | Read | Write | NAND | Warranty | Cond. | Product |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| $95.67BEST | $0.096 | $382.66 | LOWEST YET | 4 TB | 2.5 SATA | SATA | 540 MB/s | 500 MB/s | QLC | 3 yr | New | Crucial BX500 4TB |
| $101.94 | $0.102 | $407.74 | LOWEST YET | 4 TB | External | USB | 2,100 MB/s | 2,000 MB/s | — | 5 yr | New | Crucial X10 4TB Portable |
| $121.25 | $0.121 | $484.99 | LOWEST YET | 4 TB | M.2 NVMe | Gen 4 | 7,400 MB/s | 6,500 MB/s | QLC | 5 yr | New | Lexar NQ780 4TB |
| $122.49 | $0.122 | $489.97 | $479.97 | 4 TB | M.2 NVMe | Gen 4 | 5,000 MB/s | 4,800 MB/s | QLC | 5 yr | New | Silicon Power UD90 4TB· 3rd-party |
| $124.69 | $0.125 | $498.74 | LOWEST YET | 4 TB | External | USB | 2,100 MB/s | 2,000 MB/s | — | 5 yr | New | Crucial X10 Pro 4TB Portable |
| $125.00 | $0.125 | $499.99 | LOWEST YET | 4 TB | M.2 NVMe | Gen 4 | 6,900 MB/s | 6,200 MB/s | TLC | 5 yr | New | WD Blue SN5100 4TB |
| $132.53 | $0.133 | $530.10 | LOWEST YET | 4 TB | M.2 NVMe | Gen 4 | 7,250 MB/s | 6,900 MB/s | TLC | 5 yr | New | WD Black SN7100 4TB |
| $141.25 | $0.141 | $564.99 | LOWEST YET | 4 TB | 2.5 SATA | SATA | 560 MB/s | 520 MB/s | TLC | 5 yr | New | WD Blue SA510 4TB |
| $141.75 | $0.142 | $566.99 | LOWEST YET | 4 TB | M.2 NVMe | Gen 4 | 7,250 MB/s | 6,900 MB/s | TLC | 5 yr | New | Samsung 990 EVO Plus 4TB |
| $150.00 | $0.150 | $599.99 | LOWEST YET | 4 TB | M.2 NVMe | Gen 4 | 7,300 MB/s | 6,900 MB/s | TLC | 5 yr | New | Crucial T500 4TB· 3rd-party |
| $155.44 | $0.155 | $621.76 | LOWEST YET | 4 TB | M.2 NVMe | Gen 5 | 14,900 MB/s | 13,800 MB/s | TLC | 5 yr | New | Crucial T710 4TB |
| $175.00 | $0.175 | $699.99 | LOWEST YET | 4 TB | M.2 NVMe | Gen 5 | 14,900 MB/s | 13,700 MB/s | TLC | 5 yr | New | WD Black SN8100 4TB |
| $199.75 | $0.200 | $799.00 | $798.00 | 4 TB | M.2 NVMe | Gen 4 | 7,450 MB/s | 6,900 MB/s | TLC | 5 yr | New | Samsung 990 Pro 4TB· 3rd-party |
| $228.61 | $0.229 | $914.44 | $299.99 | 4 TB | External | USB | 2,000 MB/s | 2,000 MB/s | — | 3 yr | New | Samsung T9 4TB Portable |
| $250.00 | $0.250 | $999.99 | $319.99 | 4 TB | 2.5 SATA | SATA | 560 MB/s | 530 MB/s | TLC | 5 yr | New | Samsung 870 Evo 4TB· 3rd-party |
| $275.02 | $0.275 | $1,100.10 | $898.00 | 4 TB | M.2 NVMe | Gen 5 | 14,800 MB/s | 13,000 MB/s | TLC | 5 yr | New | Samsung 9100 Pro 4TB· 3rd-party |
Every SSD carries fixed costs that don't scale with capacity: the controller, the circuit board, the enclosure, the packaging. Spread those over 500GB and they dominate the price; spread them over 4TB and they nearly vanish into the cost of the NAND itself. That's why $/TB falls steadily from 500GB up to 4TB — and why 4TB is where most buyers get the most storage for their money.
The trend usually reverses at 8TB, where the largest drives command a scarcity premium and $/TB climbs back up. So 4TB tends to be the true value peak: big enough to spread the fixed costs thin, not so big that you pay the flagship tax.
4TB NVMe is the mainstream choice — fast, internal, and where the cheapest $/TB usually lives. For a gaming rig, workstation or PS5, this is the sensible buy.
4TB SATA exists but is a narrower case: it only makes sense if you need a 2.5-inch drive for a bay or NAS, since it costs about the same per TB as NVMe while being far slower. See our SATA SSD page for when that trade-off is worth it.
4TB external adds a USB enclosure and its price premium; good for portable 4TB storage, but per-TB you pay for the convenience.
If you want 4TB of space, one 4TB drive is simpler and frees a slot — and at current prices it's usually the best $/TB too. Two 2TB drives make sense only when you want the data split (say, OS on one, games on another) or already own one 2TB drive.
Going the other way, if you're eyeing 8TB, compare it against two 4TB drives first. 8TB single drives carry a capacity premium, so two 4TB drives almost always give you the same space for less — provided you have two slots. Our 8TB page runs that math in detail.
At 4TB you're storing a lot, so endurance and sustained write behaviour matter more than on a small boot drive. Prefer TLC NAND with a DRAM cache for a primary drive; DRAM-less QLC is acceptable for a bulk game or media library where large sustained writes are rare. The table lists NAND type and warranty per drive.
Also confirm the form factor fits: nearly all 4TB NVMe drives are single-sided M.2 2280 now, but a few older or high-capacity models are double-sided, which can foul a laptop or a PS5 heatsink. Check clearance before buying.