SanDisk Ultra USB 3.0 128GB

I have Windows 10 using my Samsubng T7 Shield that writes and reads at speeds around 6-700 MB/s
I have my SanDisk Ultra USB 3.0 128GB that reads at around 120-130 MB/s but only writes at 3.6 MB/s at best. My old USB 2 memory stick gets more than twice that speed. Have tested to format in both exFat and NTFS, no difference.

What gives?

Hi @tjompen1968 ,

Have you opened a Support Case? If not opened, for more information, please contact the SD Technical Support team for best assistance and troubleshooting: