The tested by me hard drive has not really convinced me. On one hand, I could not all files (videos) stream (! Restrictions of each format), on the other hand, the compound to drive irregular for no apparent reason from - especially with a direct connection (via USB port) to the laptop but also in the WLAN connection. The data transmission is interrupted and must be restarted. The causes are not clear to me. Have it on different computers tested with the same annoying result.
The wireless access is basically functioning, the speed varies greatly at the same ambient conditions and the same files. It is good that you can restrict access to the hard drive in the wireless mode (via Settings).
Conclusion:
Good idea. Execution deficient at least in my hard drive.