i have bought a SANDISK ULTRA 3.0
MOTHERBOARD ASUS Z170 GAMING
When i copy a big file 1gb or 2gb.
The speed starts with 55 Mbyte/second after 10-20 seconds the speed goes down to 20 Mbyte/second
I have tired with new drivers for the USB 3.0 - Motherboard, the problem are the same.
Please help me !