Sandisk's 8TB SDUC Cards Near Launch After Two-Year Wait, But Pricing Could Top $2,000

Sandisk's long-promised 8TB SD cards are finally moving toward retail. First teased back in 2024, the high-capacity cards stalled for roughly two years before multiple companies at Computex 2026 reportedly confirmed to Notebookcheck that shipments will begin soon. No vendor offered a firm date or price, which leaves the most interesting questions unanswered, but the specifications now circulating tell a clear story about where flash storage capacity is heading and what buyers will pay for the privilege.

What's actually shipping

The cards conform to the SDUC (Secure Digital Ultra Capacity) standard, the SD Association's tier for capacities from 2TB up to a theoretical ceiling of 128TB. At 8TB, these cards sit well below that maximum, which means the format has substantial runway left before it bumps against its own specification. SDUC is a successor to SDXC, which topped out at 2TB, and like microSD Express it is an emerging standard that needs new silicon on both ends of the connection.

According to the photograph Notebookcheck captured at Computex, Sandisk will sell a 4TB microSDUC card and an 8TB SDUC card under its Ultra line rather than the higher-end Extreme Pro family. That is an unusual placement. The Ultra brand typically anchors the value end of Sandisk's catalog, so seeing record capacities arrive there first suggests the company is treating these as capacity-first products rather than performance parts.

The performance figures back that up. Both the Ultra 4TB microSDUC and 8TB SDUC cards carry UHS-I certification, capping theoretical read and transfer speeds at 104 MB/s. They also list V10 and A1 ratings, which guarantee a minimum sustained write speed of 10 MB/s. By comparison, the Extreme Pro 4TB SDUC card holds the same UHS-I bus certification but reaches a V30 rating, tripling the guaranteed minimum write speed to 30 MB/s. For context, UHS-II and UHS-III buses, along with the SD Express interface, push far beyond 104 MB/s, so these first SDUC cards are using a deliberately conservative interface paired with enormous capacity.

The compatibility wall

Here is the practical problem buyers will run into immediately: nothing reads these cards yet. SDUC cards are not backward compatible with existing readers or devices. Some new card generations slot into older hardware and simply run slower; SDUC does not. It requires a host that explicitly supports the standard, and at the moment no such consumer device exists. You could acquire one of these 8TB cards today and have no way to use it.

That dynamic has a recent precedent. The microSD Express standard arrived in 2019 and then sat essentially dormant for six years. Its first mainstream adopter was the Nintendo Switch 2, and as of now Nintendo's handheld remains the only widely shipping device built around microSD Express. A new SD format can exist on paper, and even in retail packaging, long before a single piece of hardware gives it a reason to exist. SDUC could follow the same slow adoption curve, which would make these early cards a purchase aimed at future devices rather than current ones.

The price math

Neither Sandisk nor the other manufacturers shared MSRP figures, so the cost estimates rest on extrapolation from current pricing. Sandisk currently sells the Extreme Pro 2TB microSD card for $569.99 and the Extreme Pro 2TB SD card for $549.99, each roughly double the price of its 1TB sibling. If Sandisk holds that pattern of capacity doubling translating to price doubling, the 4TB microSDUC card lands somewhere near $1,200 and the 8TB SDUC card pushes toward $2,200.

Those are rough projections, and the Ultra branding could pull final pricing lower than a straight Extreme Pro extrapolation implies, since Ultra cards normally undercut the Extreme Pro tier. Still, even an optimistic reading leaves these firmly in specialist territory. Per-terabyte, removable flash remains far more expensive than internal SSD storage, and these cards do nothing to close that gap.

Why the timing matters

The launch arrives during a tight stretch for the memory and storage market. AI data center demand has been absorbing a growing share of global NAND and DRAM output, contract pricing has shifted back toward suppliers, and memory makers are positioned to pull substantial revenue from the buildout. In that environment, pushing record-capacity consumer flash to market is as much a signal of available manufacturing capacity and yield maturity as it is a product launch. Stacking enough NAND to reach 8TB in an SD card form factor is a meaningful density achievement regardless of how many people buy one.

The realistic read is that these cards matter more as a capacity milestone than as something most people will own soon. The standard has room to grow toward 128TB, the silicon to read it has to catch up, and the price points are steep. Sandisk has not yet responded to requests for additional detail on dates or MSRP. Until a device ships that can actually read an 8TB SDUC card, this remains a capability demonstration with a price tag attached rather than a product with a market waiting for it.

More on the SD Association's capacity tiers is available through the SD Association, and Sandisk's current card lineup is listed on the official Sandisk site.