Mozilla has added three new experiments to their Test Pilot program. The most interesting is a website available to users of any browser, which allows single-download encrypted sharing of files. The other new experiments are a note taking app and voice search.
https://www.notebookcheck.net/Mozilla-tests-file-sharing-service-that-deletes-files-after-one-download.240072.0.html
Usually I need to send way more GB. That is why I am using MyAirBridge.com, because with this online service I can send up to 20 GB totally for free and without any registration. It also has the highest possible encryption during the transfer.