Flyle

Flyle is a fast, easy, secure and free way to transfer files. It is programmed in Java, and uses a TCP connection with Asymmetric en and decryption to transfer a File specified by the Client to the Server. You can transfer Files with no size limit.

To start you need to download Flyle on both PCs in between the Files should be transfered. Next you need to be in the same WiFi or Ethernet. Or you could use ngrok, Radmin VPN or every other way of tunneling a TCP connection. Now with both of these you just need to start Flyle on Receiver and Sender. The Sender needs to insert the IPv4 of the Receiver. Next if it worked you should see that the Status on Server and Client changed from waiting and connecting to Handshake and finally to connected. Finally the client can select a File that should be sent. If it worked the Server can Accept the File. The File should be stored in the downloads folder of the receiver.