I already had AddDefaultTempStorages set up in ConfigureServices() and it works. But the FileUpload control doc page states that I should use AddUploadedFileStorage().
What is best for simple single file upload in various ModalDialog controls ?
AddDefaultTempStorages is just an alias for the AddUploadedFileStorage and AddReturnedFileStorage, so it doesnโt matter at all which one you use. Iโd only use AddUploadedFileStorage if Iโd want to have separate directories for uploaded and returned files