For a conventional data backup use there is not much negative to say. Nevertheless, in my case, I will bring more negative: - The simultaneous replication requires the installation of additional software (Smartware) that is not really the point, replication refuses to be sporadically for no reason, excessively large files (but still below 1GB) require two or three tries before you can be uploaded, and finally the drive becomes completely inaccessible and sometimes requires a reboot time to time). Maybe it is because we use it in a TPE of 3 people and we ask for "too much". However, I will not change for another solution because the price is very attractive and competitive cloud systems also have their constraints and bugs at least as troublesome as those found here. In addition problems are minor, and fail every two minutes either.