the internal HDD might be failure.
please find a dsitributor in your country,
and contact and get help.

http://www.nextodi.com/store/nvs_offline_store.html

A Local distributor will not recover your data but only carry out replacing or repairing it under warranty periods. If you haven't made a backup onto external USB drive before this accident happened? then you need to seek for a data recovery service or company who does it for you. Hope this information helps.