The purpose of FileExplorer component is to display a set of files and folders from the provided location for read, edit or delete operations. So, we are not clear on your exact requirement to add a description for the files inside FileExplorer component. Currently we don’t have any option to add description in file details dialog. Please provide us clear details on whether you need TextBox within details dialog else you need to add description from some other action of FileExplorer and share us the specific reason for this requirement. If possible, please share the video for your requirement. This would be more helpful to identify your requirement and provide the prompt solution shortly.