Performance of SanDisk Extreme 64 GB and VHDX

[SuperJMN]

Please do a full format on the USB flash drive before creating Windows To Go workspace, and you'd better to boot it from a USB 3.0 port.
If it still does not meet your requirements, recommend using a USB hard disk or a Windows To Go Certified Drives to create Windows To Go.
Thanks.

I did format before creating the workspace and I'm also using a USB 3.0 port (motherboard has 2). Using a HDD works better, but it's still the bottleneck of the system.
Which USB Flash drive gives the best performance for Windows To Go?

I will evaluate the acquisition of one.

Thank you!