What cloud storage is as good with files as dropbox?

Question

Data storage

What cloud storage is as good with files as dropbox?
What I mean?
1) When you work with a file and the cloud mail client is enabled, then there are problems with saving this file - an access error and all that. Basically, this shouldn't happen.
2) Two clients are simultaneously launched on two computers. Changes occur on one PC, on the second everything should be synchronized smoothly, without errors and on time, without creating a lot of conflicting files.
Additional info:
1) we need Windows, Linux clients
2) at least some volume is free
3) in the black list: Yandex disk, it is a drive

Answer 1

What cloud storage is as good with files as dropbox?

drop box