One day, all of the new files and folders suddenly appeared and I thought the problem was fixed. However, the next time I used the media player, all of the new additions had disappeared again and it was back to the old database. When I manually refresh the Linkstation database using the web interface, all of the files and folders immediately disappear except for one specific folder containing a TV show. When I turn everything off and back on it goes back to the original database yet again. Sometimes a file that I've added will eventually show up, maybe 1 day or 5 days later. Sometimes they never show up at all and sometimes they disappear again after a day or so.
Buffalo tech support have tried telling me that this is a codec issue and that there's nohing they can do about it. I find this highly unlikely since a) the files play fine from a USB drive, b) a lot of the files that are appearing and disappearing use the same codec as the TV show which always seems to stay on there no matter what and c) some of the files do eventually appear.
It seems like the problem is being caused by the database on the NAS not refreshing properly, but is there a way to fix this or does it sound like a faulty NAS? So far I've tried: changing the refresh time of the NAS, restoring the NAS and the media player to default, updating the firmware on both devices, manually refreshing the NAS database, ticking the 'initialise' box, connecting the NAS and the media player via ethernet. I'm really at a loss, any ideas?