ZyXEL Communications NSA325 - Network; 9.5 UPnP Port Mapping Screen

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f. Select if you allow the user to share with anyone or only users in the same
groups.
55. Can I change the uploading size for ownCloud?
Yes, you can. Please log in as administrator.
a. Select admin > Admin
b. Select File handing. The default maximum upload file size is 513 MB, you
can change the size equal to or less than 2 GB.