Review on 📷 SanDisk Extreme PRO 64GB UHS-I/U3 Micro SDXC Memory Card | Speeds Up To 95MB/s | 4K Ultra HD Ready | SDSDQXP-064G-G46A by Cristofer Cejudo

When copying files to and from the card using a USB 3.0 reader, I was able to consistently get >80MB/s. Tested with a Kingston FCR-HS3 USB 3.0 reader using H2testw v1.4 and CrystalDiskMark 3.0.3 x64 on Windows 10. Warning: Only 60873 out of 60874 MB tested. The test completed without errors. Write speed: 73.5 MB/s Read speed: 80.9 MB/s Read speed 21.55 MB/s and Write speed 19.08 MB/s, not much different from the significantly cheaper 32GB EVO card I had previously, So the device does not use the potential of the card. Internal storage is tested at 139MB/s read and 48MB/s write, while RAM is tested at 7854MB/s. Not knowing if speed could be an issue due to an incorrectly installed card, I restarted and reformatted the card with the tablet. , then rebooted again to check. The repeat test showed 21.78 MB/s reading and 17.17 MB/s writing. I tested it on my Galaxy Note 4 (SM-N910V) and it showed 78MB/s read and 54MB/s write, so a big difference. The Note 4's internal storage is tested at 204 MB/s read and 93 MB/s write, while RAM is tested at 4116 MB/s. I know where this card is now that the Note 4 can take advantage of the speed boost.