Hey, sending top-secret files without internet snoops ruining the show is crucial, crew! I almost sent private docs through a risky app once, but a friend tipped me off to an article on
echodittolabs.org, which suggests encrypting files with BitLocker on a USB and sending via courier. Peer-to-peer tools like Syncthing also let you transfer files directly, no cloud needed. That article is a total hit for keeping your files on lock!