X = 150KB/sec. SanDisk QuickFlow Technology is only available for 64GB, 128GB, 256GB, 512GB and 1TB capacities. 1GB=1,000,000,000 bytes. 1TB=1,000,000,000,000 bytes. Actual user storage less.) Pair with the SanDisk Professional PRO-READER SD and microSD to achieve maximum speeds (sold separately) G.SKILL Trident Z DDR4 3200 C14 4x16GB $357. SanDisk Ultra Fit 32GB $16. Based on 92,981 user benchmarks for the Samsung 970 Evo Plus NVMe PCIe M.2 and the SanDisk Ultra 3D, we rank them both on effective speed and value for money against the best 1,072 SSDs. When comparing the read speed of the SanDisk Ultra vs Extreme SD memory cards, you won’t find significant differences (120MB/s vs 150MB/s). It means that the transfer speed of the images from a memory card to a computer will be comparable. But, the gap in write speed between SanDisk Ultra vs Extreme is enormous (70MB/s vs 10MB/s SanDisk 256GB Extreme PRO UHS-I SDXC Memory Card. B&H # SA256GBEPSD MFR # SDSDXXD-256G-ANCIN. 115 Reviews. Key Features. 256GB Storage Capacity. UHS-I / V30 / U3 / Class 10. Max Read Speed: 200 MB/s. Max Write Speed: 140 MB/s. Transfer speed benchmarking program Crystal Disk Mark provided sequential read speeds of 120 MB/s and write speeds of 68 MB/s for the Extreme Go, far less than the 200 and 150 MB/s SanDisk advertises. Our manual USB 3.0 tests proved far better. Writing a 1.1GB, 32-minute HD video to the USB only took about 10 seconds with a very satisfying 120 d4eAO4.

is sandisk ultra or extreme better