New Samsung 980 M.2 500gb slow file transfer (ca 35mb/s)

I got my first nvm ssd today.

Benchmark score is decent ( read:3170 mb/s , write: 2573 Mb/s), but why does it perform so bad, when transferring files or starting programs? Sometimes even hovering around 8mb/s.

I updated all drivers.

Tried both NVMe slots and in BIOS changed device configuration
accordingly

And I am still getting this rate.

Thank you for any help, advice!

Motherboard: ASUS prime Z270A
SSD: Samsung 980 M.2 NVMe