Fluctuating transfer speed (MyCloud v2.11.133)

Transfer speed between my Mac and MyCloud varies greatly between zero and acceptable performance around 20MB/s. Most of the time it is around 9MB/s though, I see many instant jumps and downs till zero.

I’ve read that some users have this issue after installing v4 firmware. What about v2.11.133 which is supposed to be the latest for my MyCloud device?

Can you add your issue to this thread. Then use Blackmagic Disk Speed Test so values are consistent between devices? If using Windows then CrystalDiskMark.