« Reply #8 on: Friday 30 March 18 18:04 BST (UK) »
I wouldn't expect that error message and normally you can rename, but have the subfolders got very long names along with the file names within? There is a maximum number of characters than Windows allows for a number of actions, although it will allow you often to save even when the total number of characters in the folder/file path is exceeded. Normally long file names is only an issue when deleting or moving rather than renaming but may be worth trying to shorten one of the folder names to say a single character to try. If you try and move a folder that's path exceeds the total number of permissible characters (includes names of all folders above from the root of c drive) then it will stop you but again I wouldn't expect that message but sometimes you don't always get the message you'd expect. Mind you its possible even if you shorten one folder that it could still be too long a path.
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