Hello,
Your issue could stem from a variety of reasons, which could be related to your hardware setup, software configuration, or even environmental factors. Here's a brief rundown of things that might be causing your slow internal LAN speeds:
1. **Distance and Obstruction:** This plays an essential part in the wireless speeds that you will achieve. More distance or more obstructions, things like walls, furniture, etc., between your devices, can lead to slower speeds.
2. **Interference:** WiFi shares radio frequency with other devices such as microwave ovens, cordless phones, and even other WiFi networks. These can cause signal interference and slow down your WiFi speed.
3. **WiFi Channel Overlap:** WiFi routers can work on different channels. If your neighbors' routers are on the same channel, it can cause congestion and slow down your network.
4. **Quality of Network Cards**: The performance can also depend on the quality of the Network Interface Cards (NICs) in your computers. Some may not fully support the speed of Wifi-6, leading to slower than expected performance.
5. **Driver issues**: Ensure that the Wifi 6 adapters on your computers have the most up-to-date drivers. Outdated drivers might not be fully compatible with Wifi 6 and might be causing slowdowns.
6. **QoS Settings:** In some routers, the Quality of Service (QoS) settings might be configured to prioritise certain types of traffic over file transfers.
7. **Router or Computer Settings:** There might be router or computer settings which are limiting the transfer speeds.
To troubleshoot:
1. Check the distance and obstruction between your devices. Try to minimize the distance and the number of obstructions.
2. Try changing the channel your router is broadcasting from, this can typically be done in your router settings.
3. Look for potential sources of interference around your router and either move them or the router itself.
4. Check your WiFi 6 adapters have the latest drivers installed for them, usually found on the manufacturers' website.
5. Try disabling QoS on your router, if it's enabled.
6. Look for power saving settings on your computers that might be throttling your network cards and adjust them accordingly.
7. You may also wish to temporarily disable any antivirus or firewalls on your Windows machines to see if they are causing the issue.
8. If all else fails, you might want to consider setting up a wired connection between your machines for large file transfers, which tends to be more stable and faster.
Hope this helps guide your troubleshooting process. Let us know if you have any further questions or if there's more we can do to assist.