How can I transfer large files from my Mac to a Windows 10 PC on the same network?

Using an SMB or FTP server would be one of the simplest ways to handle the transfer. If you're worried about setting up a server, there are user-friendly FTP servers out there that are relatively easy to work with, though I totally get that setting one up can be tricky. Also, you might want to consider getting a gigabit switch and connecting all your devices to that instead of relying on the router. This can solve client isolation issues and improve your connection speeds significantly.

Have you thought about getting a RAID NAS? It provides better security for your data and makes it easier for both your devices to see each other. Plus, it keeps backups!

First, make sure your devices can see each other on the network. Check your router and Mesh system for any blocking features like client isolation that might prevent them from connecting. A tool called HFS by rejetto can help; it's an HTTP file server that works on Windows. It allows any device with a browser on the network to access files and upload them directly to your PC. But remember, both computers need to be visible to each other for this to work. Also, ensure network discovery is enabled on your Windows PC.