Large File Uploads
When uploading files through the web client, ownCloud is limited by PHP and Apache configurations. By default, PHP is configured for only 2 megabyte uploads. As this default upload limit is not entirely useful, we recommend that your ownCloud admin increase the ownCloud variables 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.