I had recorded three episodes of Strike: The Cuckoo's Calling and decided to place them in their own directory so I highlighted one of them and pressed Menu and selected Create Directory, the virtual keyboard is displayed with the name in the edit field so pressing green creates the directory. I then moved the three recordings into the directory, but when I opened the directory no recordings were visible. OpenWebif did not display them either. The files were displayed in Filezilla. I edited the directory name and removed the colon and the files are now displayed as expected. Is the colon symbol a delimiter in Linux? That might explain why the directory could not be found, anyway just a workaround for anyone seeing the same behaviour.