SanDisk has introduced two new SSD series for network-attached storage (NAS) systems: the NAS 600 SATA SSD and the NAS 800 NVMe SSD. Both are aimed at demanding home users and small businesses that use their NAS for multi-user workflows, caching, or as primary storage. The focus is on high write endurance and consistent performance in 24/7 operation. Both models are expected to be available starting in September.
Key Points at a Glance
- SanDisk NAS 600: 2.5-inch SATA SSD, 500 GB to 4 TB, up to 2,500 TBW, and 560 MB/s read speed. Designed to replace HDDs in existing NAS bays.
- SanDisk NAS 800: M.2-2280 SSD with PCIe 5.0, 960 GB to 7.68 TB, up to 14,900 MB/s, and 14 PBW write endurance. Targets all-flash and hybrid NAS systems with high data throughput.
- Both series effectively replace the discontinued WD Red SSD line following SanDisk’s spin-off from Western Digital in February 2025.
- Market launch: September 2026 via Sandisk.com and select retailers.
SanDisk NAS 600 SATA SSD: Easy Upgrade for Existing NAS Systems
The NAS 600 is designed as a straightforward transition from HDD to SSD, either as a complete replacement or as an additional cache layer alongside existing hard drives. With its 2.5-inch/7-mm form factor and SATA interface, it fits into NAS enclosures that support 2.5-inch drives, including many 3.5-inch bays with the appropriate adapter.
For the largest 4 TB model, SanDisk specifies a write endurance of up to 2,500 TBW and an MTTF of 2.25 million hours. The SSD reads sequentially at up to 560 MB/s—significantly faster than any traditional NAS hard drive—and does so silently, without the vibrations generated by multiple HDDs in a single enclosure. This is expected to result in noticeably improved responsiveness, especially in multi-drive and RAID configurations where multiple users access the same shared folders simultaneously.
SanDisk NAS 800 NVMe SSD: PCIe 5.0 Speed for Demanding Workloads
The NAS 800 is expected to deliver significantly more performance. It uses the M.2-2280 form factor with a PCIe 5.0 interface and Sandisk’s own TLC 3D NAND. For the 1.92-TB model, the manufacturer specifies sequential transfer rates of up to 14,900 MB/s read and 13,200 MB/s write, and for the 3.84-TB model, up to 2.3 million and 2 million IOPS, respectively, for random access. The write endurance for the top-of-the-line 7.68-TB model is up to 14 PBW, which, according to the manufacturer, corresponds to a workload of roughly one full drive cycle per day over five years.
The target audience consists of all-flash and hybrid NAS systems with tasks that go beyond simple file sharing: caching, storage tiering, databases, virtualization, content creation workflows, and, increasingly, locally run AI applications. SanDisk states that it has tested the SSD for compatibility with numerous popular NAS systems.
Technical Specifications Comparison
| Feature | SanDisk NAS 600 (SATA) | SanDisk NAS 800 (NVMe) |
|---|---|---|
| Form Factor | 2.5 inches / 7 mm | M.2 2280 |
| Interface | SATA III | PCIe 5.0 NVMe |
| Capacities | 500 GB to 4 TB | 960 GB to 7.68 TB |
| Sequential Read (max.) | up to 560 MB/s | up to 14,900 MB/s |
| Sequential Write (max.) | N/A | up to 13,200 MB/s |
| Random Read/Write (IOPS, max.) | N/A | up to 2.3 million / 2 million |
| Write endurance (top model) | Up to 2,500 TBW (4 TB) | up to 14 PBW (7.68 TB) |
| MTTF | Up to 2.25 million hours | Up to 1.75 million hours |
| NAND | SanDisk 3D NAND | SanDisk TLC 3D NAND |
| Warranty | 5 years | 5 years |
Specifications according to SanDisk; MTTF for the NAS 800 per technical data sheet (Source: NAS Compares). Read/write speed and IOPS values vary depending on capacity; the values listed here are the highest figures specified by the manufacturer.
Why Now? The Context Behind the NAS Portfolio
The new series didn’t come out of nowhere. SanDisk spun off from Western Digital in February 2025 and has since operated as an independent storage manufacturer. The NAS 600 and NAS 800 essentially take on the role previously played by the WD Red SSD series for NAS systems. This aligns with the fact that NAS buyers have long been specifically seeking durable drives designed for continuous operation.
Anil Moolchandani, Vice President of Product Management at SanDisk, attributes this move to changing usage patterns: “The way NAS systems are used has fundamentally changed. Demanding home users, creative professionals, and small businesses are now working with ever-larger amounts of data, increasingly collaborating in teams, and rely on systems that remain reliably high-performing around the clock. We developed the SANDISK NAS portfolio to meet precisely these changing requirements.”
Compatibility: PCIe 5.0 Is Still the Exception in the NAS Environment
One point prospective buyers should keep in mind before purchasing: PCIe 5.0 is still far from being the standard in current NAS systems. Most M.2 slots in consumer and prosumer NAS devices from Synology or QNAP currently run on PCIe 3.0 or 4.0. The NAS 800 will therefore operate below its maximum data rate in many systems until more NAS hardware with PCIe 5.0 support comes onto the market. If you want to upgrade now, you should first check the data sheets for your NAS to see which PCIe generation the M.2 slots actually support. Otherwise, you’ll be paying for bandwidth that goes unused.
Pricing and Availability
SanDisk has not yet announced specific prices at launch. Both series are expected to be available worldwide starting in September 2026 via Sandisk.com as well as select retail and online partners. Given the current tight NAND prices, the NAS 800—especially in the higher capacities—is unlikely to be a bargain. We’ll update this article as soon as specific MSRPs are available.
Conclusion
With the NAS 600 and NAS 800, SanDisk fills the gap left by the discontinuation of the WD Red SSD series, covering two scenarios at once: a simple, quiet SATA upgrade for existing NAS systems and a significantly faster NVMe option for anything beyond basic file sharing. Whether it’s worth investing in a NAS SSD ultimately depends on your specific NAS setup. If you’re just storing files, you’ll usually get better value with the NAS 600 or a traditional NAS hard drive. On the other hand, if you want to serve multiple users, databases, or AI workloads simultaneously, the NAS 800 is the first SSD that’s actually designed to handle that kind of performance.
Sources: SanDisk NAS 600 product page, SanDisk NAS 800 product page,
