This device is very easy to use once installed. The documentation is not badly done, but it is very unclear as regards 1. sharing between the network and a USB connection on the computer, probably rough translation leading to confusion and 2. much more serious: the reset to factory settings procedure does not work as described in the doc, I have not finished successfully, but after long and painful trial and error. On the functionality level, it is a pity that the USB partition can only be used in Public mode, which is annoying if we open FTP access to the outside world. Moreover, the electrical protection is poor, the device has disconnected itself during a storm this week. I finally managed to do leave, but this is not very reassuring for data integrity.