trying to create a folder in a sandisk flash memory stick

i am trying to create a new folder and after entering a name there is no button or way to enter

If after entering the folder name you are not able to highlight or copy the folder, type the folder name and press enter this may help to locate the folder.
Verify that the SanDisk you are using is writable. Some drives have a physical write-protection switch that prevents changes to the drive. Make sure this switch is either removed or in the correct location. Make sure that the drive is not configured in a read-only or restricted mode because such restricted configuration also leads to such error.