Resilio Sync is an awesome product. Its amazing to be able to sync my pics from my Phone to my PC wireless over the Internet and to be able to sync Music and Movies from my PC to my phone over a Lan etc.
For sending a file over LAN without using a protocol such as SSH, magic-wormhole works well.
SSH works fine for sending/receiving data, but like FTP it chokes with high amount of small files. So its best, as usual, to use tarballs or zips.