Large File Uploads
When uploading files through the web client, ownCloud is limited by the server configuration. We recommend that your ownCloud admin updates the server environment to sizes appropriate for users.
Modifying certain ownCloud variables requires administrative access. If you require larger upload limits than have been provided by the default (or already set by your administrator):
Contact your administrator to request an increase in these variables
Refer to the section in the Admin Documentation that describes how to manage file upload size limits.