You forgot to set the file scope
And without setting it, filo scope App will be used to store the file in ASD
Also you can't store files in arbitrary directorues anymore, i.e. you can't store a file in the root directory of the emulated sdcard; store it in shared storage
Set file scipe to Legacy and try this filename
/Download/datos cav
See also Some basics on Android storage system
And next time first set the language to English before taking a screenshot
Taifun