NVME Internal Speed?

Hello Everyone

Has anyone noticed the slow speeds with internal transfer? I have a 4 TB NVME as the main drive and then via slow 7 the NVME are raid 0, only to transfer the data fast off my machine then internal 12 TB spinning drive for backup.

I was transferring from the 7TB NVME to internal 4TB NVME and got really slow speeds



I have same issue, also running TB4 Acasis 4bay unit with 4x Samsung 990pro in raid 0, and unable to get above 600MB/S. Internal between M.2 I hardly get 500mb/s