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 !
if you are refering to the write speed of the drive i think that its not published. in order to get confirmation that the drive is working fine you can test the speed of the drive with the crystal disk mark software and send the results to the sandisk support under the following link:
Here the results: WRITE SPEED
Write speed in Windows copy mode throttle after cca.15 sek from 50 MB/S to 17MB/S
in that case i see that the actual results of the drive is a read speed of 120MB/s and a write speed of 37mb, that is still a pretty good speed for this drive.
windows of course calculates the speeds differently and is specialized for HDD and SSDs so it counts different factors.