Ok let's do the trust and compare thing

- Dropbox is a registered company, savefileme is an unknown

- Dropbox has a ToS, savefileme ?

- Dropbox discloses to a certain degree who owns it and works there, savefileme is an e-mail address

- Dropbox has a published architecture of both his frontend and backend. Savefileme has a partial opensource client (don't forget that include from savefile.me) and no details published of it's backbone

I could go on and I could switch dropbox for OneDrive or Tresorit. You may have a fantastic product, but basically it doesn't look trust worthy or even better then <big name storage solution>