# Nextorage NN4LE 4 TB: high-capacity DRAM-less PCIe 4.0 NVMe (2026)

The Nextorage NN4LE 4 TB is a PCIe 4.0 x4 NVMe SSD from the G Series LE line, built on the Phison PS5027-E27T controller with Kioxia BiCS6 3D TLC NAND and a host-memory-buffer design, rated 7,200 MB/s reads and 6,200 MB/s writes with 2,400 TBW of endurance and a 5-year warranty.

Quick answer: The Nextorage NN4LE 4 TB is a capable high-capacity DRAM-less PCIe 4.0 drive: the efficient Phison E27T controller, current Kioxia BiCS6 TLC NAND, the highest random read rating and largest SLC cache in the line, and a 5-year warranty with a substantial 2,400 TBW endurance — in a single-sided form factor that is uncommon at 4 TB.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 4 TB |
| Interface | M.2 4.0 x 4 |
| Controller | Phison PS5027-E27T |
| Memory type | Kioxia BiCS6 3D TLC |
| DRAM cache | No |
| Sequential read | 7200 MB/s |
| Sequential write | 6200 MB/s |
| Random read IOPS | 1400000 |
| Random write IOPS | 950000 |
| Endurance | 2400 TBW |
| MTBF | 1500000 |
| Warranty | 5 years |

## Performance

The NN4LE 4 TB is rated at 7,200 MB/s sequential reads and 6,200 MB/s sequential writes over PCIe 4.0 x4, with 1,400,000 random read IOPS and 950,000 random write IOPS. The random read rating is the highest in the line, reflecting the greater NAND parallelism at 4 TB.

The large NAND array gives this capacity the biggest SLC write cache of the NN4LE range, so it sustains large sequential transfers — big game installs, media files, backups — longer before throughput settles to native TLC write speed. The DRAM-less HMB design keeps power and heat low even at 4 TB, and the single-sided board helps a heatsink or motherboard cooler make good contact. Everyday responsiveness is strong and close to DRAM-equipped Gen4 drives for typical use.

## Endurance, TBW & Warranty

Nextorage covers the NN4LE with a 5-year warranty. The 4 TB model is rated for 2,400 TBW (terabytes written) and an MTBF of 1,500,000 hours, with coverage ending at whichever limit comes first: five years from purchase or 2,400 TBW of cumulative writes.

At a typical 30 GB of writes per day, reaching 2,400 TBW would take more than two centuries, so the 5-year term is the only meaningful limit. Even at a sustained 100 GB per day, the endurance rating spans roughly 65 years. The TBW ceiling is entirely irrelevant for consumer use at this capacity; the warranty length is the binding factor.

## Pros and Cons

**Pros:**

- Highest random read rating in the line (1,400,000 IOPS)
- Largest SLC cache and best sustained write of the NN4LE range
- Single-sided M.2 2280 at 4 TB — better cooling and compatibility
- Current Kioxia BiCS6 162-layer 3D TLC NAND
- Very high 2,400 TBW endurance with a 5-year warranty
- Efficient DRAM-less design runs cool
**Cons:**

- DRAM-less (HMB) — no dedicated DRAM cache
- Peak sequential read (7,200 MB/s) slightly below the 1/2 TB models
- Ships bare — needs a separate heatsink for PlayStation 5 use
- Limited Western retail availability
- 4 TB carries a higher absolute price than smaller capacities


## Verdict

The Nextorage NN4LE 4 TB is a capable high-capacity DRAM-less PCIe 4.0 drive: the efficient Phison E27T controller, current Kioxia BiCS6 TLC NAND, the highest random read rating and largest SLC cache in the line, and a 5-year warranty with a substantial 2,400 TBW endurance — in a single-sided form factor that is uncommon at 4 TB.

It suits a Gen4 desktop or laptop needing bulk, fast storage for a large game library or media. Buyers who want it in a PlayStation 5 should choose the heatsink-equipped NEM-PA version, and those who prioritise the very highest peak sequential reads might note the 1 TB and 2 TB are rated slightly faster at 7,400 MB/s.

## Frequently Asked Questions

### Why is the NN4LE 4 TB rated slightly slower than the 1 TB and 2 TB?

Its sequential read is rated 7,200 MB/s versus 7,400 MB/s on the smaller capacities. This is normal for high-density DRAM-less drives: the larger NAND array adds addressing overhead that marginally lowers peak sequential read, while improving parallelism, SLC cache size, and sustained write. The difference is small and rarely noticeable in everyday use.

### Is the NN4LE 4 TB single-sided?

Yes. It uses a single-sided M.2 2280-S2-M layout, which is uncommon at 4 TB — many 4 TB drives are double-sided. A single-sided board cools more easily, makes better contact with a motherboard M.2 heatsink, and fits thin laptops and slots with limited clearance.

### What controller and NAND does the NN4LE 4 TB use?

It uses the Phison PS5027-E27T, a four-channel, DRAM-less PCIe 4.0 controller, with Kioxia BiCS6 162-layer 3D TLC NAND and the host memory buffer in place of on-board DRAM. The platform delivers near-PCIe-4.0-ceiling speeds efficiently across all capacities.

### Can the NN4LE 4 TB be used in a PlayStation 5?

It is a compatible PCIe 4.0 drive, but it ships bare and the PS5 requires a heatsink for M.2 expansion drives, so you would need to add one. Nextorage's NEM-PA series is the same drive sold with a heatsink and is the intended drop-in PS5 option.

### What is the TBW endurance of the NN4LE 4 TB?

The 4 TB model is rated for 2,400 TBW (terabytes written) with a 1,500,000-hour MTBF. The 5-year warranty covers whichever comes first: five years or 2,400 TBW. At 30 GB written per day it would take more than two centuries to reach 2,400 TBW, so the warranty period is the only practical limit.

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Last updated: 2026-06-13. Source: https://ssdrive.net/nextorage-nn4le-4-tb