If your swiss, just use swisstransfer.com. it's fast, supports up to 50gb of data, 500 transfers per day (and free!), more than you'll ever need. Although for security, they do say your filles are sent over https, but because they do not promote encryption I suppose they don't support that (although they do support password protected files).
So yeah, it's usually more than enough for most use cases, although I'd encrypt my files before sending them if they contain sensitive data, but that's rarely the case.
Didn't see the comment before posting
Totally agree, swiss transfer is incredible but I thought its use was restricted to Switzerland?