Windows RT Surface is a great tablet but the non-pro edition is pretty locked down and getting access to files from the integrated Apps can be an issue. Enter SME Personal Cloud.
Amongst other desktop tools the SME Personal Cloud comes with what we refer to as CloudDav and provides WebDav access to any of the Cloud Storage Accounts that you have mapped to your Account.
Enabling WebDav on the Windows Surface Tablet can be done simply with a batch file in the following format:
NET USE * \\webdav.storagemadeeasy.com@SSL\DavWWWRoot
(or NET USE * \\webdaveu.storagemadeeasy.com@SSL\DavWWWRoot for the SME EU Server)
Once this is done you have a fully functional cloud drive on your Surface Tablet to get to all your public / private cloud files !