What is the best cloud for collaborative development?

Question

Game development

We work in UE4, we use the POISON to store the project, but there is one problem .
Yandex disk lives its own life, produces copies of files, and sometimes decides to delete them altogether,
i.e. there is a situation, my friend and I have the Internet turned off, he makes changes, then I make changes, then we turn on the Internet and Poison has 2 copies of one project. What should he do? At least ask the user what to do, but he does not.
Are there clouds in which such a collision is solved more adequately? Of course, privacy is important
PS Do not advise Git, it is not suitable for such projects, and it is difficult to manage it

Answer 1

File storage https://mega.nz for >2GB
Git repository https://bitbucket.org/ for <2GB

Answer 2

https://www.visualstudio.com/products/visual-studi...
Private repositories for up to 5 users for free.
Worked in both tfs and git. Purely subjectively, tfs is more convenient, in the same place in the bug tracking box.