To YourComputerGuy,
I do observe you get the same bad experience with the USB 3.1 models.
The reply from Sandisk to be not worry that USB 3.1 product line does offer LESS quality and functionality than USB 3.0 product line is inadmissible.
I understand that MAY BE in the future USB 3.1products line will do offer the SMART support as currently USB 3.0 products line does !
At the moment I do use USB 3.0 products line ( 32GB, 64GB, 128GB) exclusively.
I wait for Sandisk will prove one day their any USB 3.1 product do offer NOT LESS than any USB 3.0 product.