Can I copy the first files manually and then sync?

I’m trying to sync my iTunes library, from work to home, but it’s .7 TB’s of data that I don not want to transfer over the web. could I simply do the initial transfer manually and then use Syncthing?

It should be fine, though it will have to be indexed on both sides which might take some time and consume a bit of CPU.

I’ve done this multiple times (although not with so much size of data) and Syncthing performs like a champ! No problems here.