I gave up on this also. My solution. Download iSMEStorage App for free. It works on iPad or iOS. It supports WebDav for the free storage they offer but also it adds WebDav to DropBox and Google Drive so you can use any of these accounts as if they were webdav servers. There seems to be a gazillion cloud storage companies they support. WebDav can be configured in the iPad or it can be configured on their site. They have a guide to setting up WebDav (StorageMadeEasy :: Wiki: WebDav Cloud Provider) and also a guide for their App (StorageMadeEasy :: Wiki). Good luck !