SanDisk’s first 8TB SDUC memory cards are coming soon, here are the latest details (see current SanDisk offerings):
SanDisk is moving forward with its long-awaited high-capacity SDUC memory cards. After an initial 2024 announcement and a delay from the originally planned 2025 launch, new details emerged last month at Computex 2026 confirming that 8TB full-size SDUC and 4TB microSDUC cards are on track to ship shortly.
Coming soon: world’s first SanDisk 4TB microSD and 8TB SD memory cards
What We Know About the Cards
SanDisk plans to launch these under its Ultra lineup (with some Extreme Pro variants also referenced):
Both are UHS-I cards with a theoretical maximum transfer speed of around 104 MB/s. The Ultra models carry V10 and A1 ratings (minimum sustained write speed of 10 MB/s). An Extreme Pro 4TB SDUC version is also expected with a higher V30 rating.
These cards fall under the SDUC (Secure Digital Ultra Capacity) standard, which covers capacities from just over 2TB up to a theoretical 128TB and uses the exFAT file system (like current SDXC cards).
The Major Compatibility Issue
Here’s the big caveat – these cards are not backward compatible with existing SDXC readers or devices.
New multi-standard readers that combine UHS-II, SD Express, and SDUC support are expected and were reportedly shown at Computex, but they are not yet widely available.
SanDisk has not released official pricing, exact launch dates, or full spec sheets yet.
