Unraid's built in file manager cannot handle special characters in directory names safely. Through a bad docker configuration I ended up with a quoted version of a folder in my share. For example, I had the folders data and "data" in the same share. Deleting this unnecessary folder with quotes through the built-in file manager deleted the original data folder, leaving the unwanted "data" untouched. Quotes in directories are of course not a commonly allowed character, but as a result of the file manager's improper handling of them I've now lost my data. To reproduce simply create two directories in the same share using the same name, one with quotes the other without. Attempting to delete the version with quotes will instead delete the unquoted version.