To help us accurately identify the cause of the issue, could you please provide screenshots of your network settings and the speed test results? Thanks!
Regarding the issue you reported, our internal team has conducted several attempts but has not been able to reproduce the situation in our testing environment.
To determine if specific environmental factors are involved, we suggest you first check the transfer speeds within your local network.
If the issue persists, please open a support ticket so our technical team can provide further analysis and assistance. Thank you! Support Portal: https://service.qnap.com/
There is an internal support ticket on this. The problem is not the LAN speeds, the problem is internet speed via the QM2-2P10G1TB adapter, the uploadspeed is capped on 1Gbs via the QNAP browser/system. No problem with the 2,5Gbs port and or the 5Gbs USB port, these up.down internet speeds are OK.