Hi, I am trying to get a cloud backup app that works with Mac OS 10.7.5 (Lion). I was using Dropbox and Google Drive, but they have stopped working on my OS. iCloud Drive does not work either -- it requires Yosemite as a minimum. I can't upgrade my OS beyond 10.7.5 because my compute (white 2007 Macbook) does not support any newer version. I can still use any of the above services via a web browser, but that is very inconvenient, since I have a lot of files to backup that I constantly update. Any help will be greatly appreciated!