Adding myself to the chorus of critics here. Only able to upload to idrive at 130kB/s while my internet connection allows up to 1MB/s. So it would take many weeks to upload everything. Express backup is not only inconvenient but also not supported in my country apparently.
Additionally, would expect some kind of support from iDrive, as a paying customer, but got no response when using their support form and their support email. Quite an unsatisfactory experience.