I'm actually migrating to Amazon Drive because i'm very desappointed by Hubic ! The bandwith is very bad, the web client does not support folder import, and all desktop clients are not very powerfull.
If you want upload several files that are big (5 or 10 GB), it will work.
But if you want to synchronise a lot of little files, it will be very, very, veryyyyyyy long ..... because you can upload just one file at once and the the second file waiting for the upload termination confirmation of the first to start. It's this delay that takes time.
It's been for nearly one year i have a hubic account. I'm waiting for migrating all my data to Amazon and i will say goodbye to Hubic.
For information, i only have 2TB to save.