SBG7600AC2 usb not recognzing 250GB drive

Since you're experiencing an issue with the USB, I recommend following the steps outlined in the articles below:

http://arris.force.com/consumers/articles/knowledge/SBG7600AC2-USB-Media-Sharing

I followed the instructions in the link you provided. 

Still doesn’t work. 

FYI i’m running windows 10.   There is a mention of certain devices needing their own power supply.  Could this be an issue?  Again, the port did recognize the SanDisk 128GB drive but refuses to see the 256GB drive.  Both were formatted NTFS. Are there any indicators on the router itself that would show the presence of the USB drive?  A light perhaps? I haven’t seen anything but maybe I’m missing it?

Hardware Information
System:    ARRIS DOCSIS 3.0 Gateway / Retail
HW_REV: 2
VENDOR: ARRIS Group, Inc.
BOOTR: 2.2.0.46
SW_REV: (Edited personal information)
MODEL: SBG7600AC2
Serial Number: (Edited personal information)
Options:    
 Firmware Build and Revisions
   Firmware Name:    (Edited personal information)

After some wrestling, and rebooting the router several times (that is, unplugging it and waiting from 10 seconds to 1 minute)  it finally did recognize the drive. However, MS Windows File history is not able to write to it.  What would cause this?  Under File Sharing, I tried to set “everyone access” on the available shared folder to “yes”, but refreshing the screen it still says no. Should this be??  Also, should “access control” be checked and the attached device be added to the approved list?  I don’t remember setting these for the previous drive.

Thanks for your continued assistance.

We recommend following the troubleshooting steps in the post below, which includes a link to the Microsoft forum.