I'm trying to set up sync between my Synology DS215J NAS and my Google Nexus 7 tablet. On my tablet, I set up a "backup folder" to backup my pictures. On my NAS, I created a sync folder with the key (or link) provided by the tablet when that folder was set up. Now on my NAS, the folder says, "Pending approval." I've looked everywhere on my tablet and I don't see any notification or anything to allow me to accept approval. What do I do?