I found this hidden folder on a storage server 2008 that all of a sudden started reporting the C drive as almost full. C:\build\filerepository and C:\build\repository. The second contains an index.bin file, the first appears to have a huge number of Windows files in it. What, and why? I can't find any useful info about this from the usual search engines. [whoops, accidentally posted this twice. Moderator please remove.]