Both Samsung and SanDisk perform well in this area. While SanDisk claims read/write speeds of up to 1000-2000 MB/s in its SSDs, Samsung SSDs offer anywhere between (up to) 540 MB/s and 1050 MB/s. But, in the real-world scenario, both devices would likely return speeds of around 400-450MB/s. Both the SanDisk Extreme and the EVO Select by Samsung have the same 90MBps write speed and while the 160MBps read speed is better on the Extreme, it isn't $27 better. Which should you get? The SanDisk Extreme Portable SSD V2 costs 14 cents per gig in both its 1TB and 2TB forms. The ADATA SE800, which as mentioned is even more ruggedized than the G-Drive SSD, sells for 13 cents per SanDisk’s brand has seen better days. SanDisk’s New Extreme 400GB is the World’s Fastest UHS-I microSD Card. Micron’s Record-Setting 1.5TB microSD Card Stores 4 Months of Video. SanDisk 32GB SDHC Micro Ultra Memory Card Works with Samsung Galaxy A50, A40, A30 Cell Phone Class 10 (SDSQUAR-032G-GN6MN) Bundle with (1) Everything But Stromboli MicroSD and SD Card Reader dummy SanDisk 64GB Ultra microSDXC UHS-I Memory Card with Adapter - Up to 140MB/s, C10, U1, Full HD, A1, MicroSD Card - SDSQUAB-064G-GN6MA Read/Write Speeds. Extreme Pro cards boast faster read and write speeds compared to the Extreme series. This means quicker data transfer, shorter buffer clearing times, and enhanced overall performance, making Extreme Pro cards ideal for photographers who demand maximum speed and efficiency. 2. Storage Capacities. The SanDisk Extreme Pro UHS-I has a maximum read speed (a.k.a. transfer speed) of up to 170MB/s compared to the 150MB/s of the SanDisk Extreme. However, the Extreme Pro also comes in a UHS-II type version which has a maximum read speed of up to 300MB/s. The new SanDisk Ultra Plus solid-state drive is an upgrade to the SanDisk Ultra that came out last year. The Plus notation doesn't necessarily mean better performance, but rather lower total cost. The SanDisk Extreme microSD cards match Samsung's performance. They are a little more expensive but available almost anywhere you find electronics. the A1 SanDisk Ultra class 10 cards will do 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. XzLZiG.