Do you mean an occasional one-off transfer or to keep synced constantly?

For one-off stuff, I’ve used Olive Tree FTP server for more than a decade on my android devices. It’s not always on, or a target for malicious stuff like a typical FTP server, you only run it when needed. I’m sending from a Win10 box, you didn’t mention how you are sending, but if it’s a desktop, nothing is easier than a quick FTP server instance.

https://play.google.com/store/apps/details?id=com.theolivetree.ftpserver

Adguard seems to do a good job blocking the Nova calls to home. Thing is, it’s like an AV or VPN, you can only guess that it’s working over time, you really don’t know for sure.

I’m fed up with logging in every day. Why can’t I stay logged in for some reasonable time like other apps?