I accidentally put my Outlook pst into my synced folder a few days ago, and was planning to move it out. Unfortunately, in the mean time it has been deleted - I assume by BT Sync. I know these files are normally supposed to be moved to the .SyncTrash after deletion, but it is nowhere to be found. I've had this happen once or twice before with less important files, so I thought it was worth mentioning. Perhaps there's a bug causing it, perhaps it's user error. I've resigned myself to the loss of the file - it was all over 3 months old anyway, but perhaps take it as a word of caution.