Hi there!
Based on the symptoms you've described, it's possible that your Lexar NM800PRO NVMe drive could be causing the issues on your system. The slow speeds and the errors you're experiencing could indicate a failing or malfunctioning drive.
To further validate this, you can try running some diagnostic tools specific to your SSD, such as Lexar's own SSD Toolbox or other third-party software like CrystalDiskInfo. These tools can provide more detailed information about the health and performance of your drive.
If the diagnostics confirm that the drive is indeed failing or showing signs of degradation, it's recommended to back up your data immediately and consider replacing the NVMe stick to prevent any further issues and potential data loss.
Hope this helps, and best of luck with troubleshooting your system!