The external USB hard disk is not recognized by the CloudStation.

Make sure USB drive is connected properly, and try formatting it.

1. Remove the USB drive from the CloudStation.
   If the USB drive is recognized, the Function LED of CloudStation lights up.
2. Connect the USB drive to the PC and check if the USB drive is recognized.
   
   [How to confirm the recognition]
   Open the device manager.
   • Windows 7
     Click [Start] and right-click [Computer].
     Click [Manage], then select [Device Manager].
   • Windows Vista
     Click [Start] and right-click [Computer].
     Click [Manage], then select [Device Manager].
     If the recognize message is open, click [Continue] button.
   • Windows XP
     Click [Start] and right-click [My Computer].
     Click [Manage], then select [Device Manager].

   Confirm the USB drive name is appeared in the list.
   
   If the USB drive is not recognized by the PC, try the following action;
   a) Change the USB cable or USB port and reconnect it.
   b) Make sure the connection of the power and the connect, and reconnect them.

3. Format the USB drive to NTFS.
   

   Only the USB drive formatted by NTFS can be recognized by the CloudStation. Our USB drive can't be recognized when you connect it to the CloudStation right after you open the package due to the default format type of our USB drive products is FAT32. The USB drive needs to be formatted to NTFS before you connect it to the CloudStation. Refer to the Answers for how to format the USB drive. Click here in case that Windows 7/Vista is installed.