ZyXEL NAS326 User Guide - Page 345
External USB Drives, Storage
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Chapter 28 Troubleshooting • Check the NAS's DNS setting. The DNS server the NAS is using must be able to resolve the domain controller's address. If the domain controller uses a private IP address, the NAS needs to use a private DNS server. If the domain controller uses a public IP address, the NAS needs to use a public DNS server. • Leave the domain and re-join it. A domain user can't access a share. In addition to the checks listed previously for local users, check that the domain controller is turned on and connected to the network. A user can access a share but cannot access individual folders or files within the share. • Check the Access Control List (ACL) of read/write permissions associated with the share's specific files and/or folders. Account names added to the list are linked to the files and folders that they are allowed to access, along with what kinds of actions they are allowed to perform with those files and folders (delete, move, rename, and so on). 28.7 External USB Drives The COPY LED is red. Copying files to or from a USB device or SD card failed. The USB device or SD card may not be compatible with the NAS. Try to save the files onto a computer and then from the computer to the NAS (through the network connection). 28.8 Storage Migrating from RAID 1 to RAID 5 did not expand the storage capacity. The NAS normally expands the storage capacity by itself after rebuilding the RAID but may not if the NAS rebooted during the RAID re-build. After the re-build finishes, go to the Storage screens and select the volume or disk group and click Manage and use Expand the volume with unallocated disk space. Cloud Storage User's Guide 345