Reading EXR files over network

Trying to read and playback EXR image sequence from a BMD Cloud POD network storage into sequencer but the bandwith is never above 12MB/s into UE511. But it is reading 350MB/s over the ethernet adapter. (The storage drive is not mounted, no difference in performance)

When read and playback are done from C-drive (SSD) the bandwith into UE is 1.2GB/s and the playback is smooth.

Has anybody else experienced this problem and what might be the solution for reading a heavy EXR sequence into UE from a network storage?