SanDisk 4.0 Memory Card Hits 3700MB/s Read Speed, 4TB Model Tops $10K

SanDisk's new CFexpress 4.0 Type B card uses a PCIe Gen 4 interface, delivering sequential read speeds up to 3700MB/s and writes up to 3500MB/s. The SANDISK Extreme PRO CFexpress 4.0 Type B targets creators hitting bandwidth ceilings with older 2.0 cards—buffer freezes during 8K recording sessions are the exact bottleneck this release addresses.

Capacities of 1TB and above carry VPG-1600 certification, guaranteeing sustained write speeds no lower than 1600MB/s. SanDisk claims that threshold supports 12K resolution RAW video capture without dropped frames. For extended high-bitrate recording sessions, sustained performance matters more than peak burst numbers—this card finally delivers both. Smaller capacities earn VPG-400 and VPG-800 certifications, sufficient for 4K and 6K workflows.

Pricing starts at $249.99 for the 128GB model (roughly ¥1703.86) and climbs to $1799.99 for the 4TB version (around ¥12268.19). The top-tier price is steep, but in a kit where camera bodies and lenses run five figures, storage is the wrong place to cut corners. SanDisk includes SmartIdle technology that drops into low-power mode during standby, plus durability specs covering 5-meter drops and 70-newton bending force—useful insurance for field shoots.

Six capacities span 128GB, 256GB, 400GB, 1TB, 2TB, and 4TB, covering light users through professional teams. The catch: availability lands in Q3 2026, which pushes planning timelines out considerably. SanDisk backs the cards with a limited lifetime warranty. For anyone mapping out gear upgrades, the wait gives time to budget—storage is one expense that pays back immediately, and skipping it always costs more later.