Dowloading .dsf files to Android

I am trying to dowload .dsf files to my Galaxy Note 8. The download progresses normally and eventually i see the file in ‘downloads’. When i open it, ‘no files’. However, the file size is listed accurately and the phone’s storage is reduced by the correct amount. Where is this mysterious file? If i delete it, storage is restored by the same amount. It’s out there somewhere.

Thanks very much,


Please provide the mandatory logs repeating the same here won’t give more needed details.

And screenshots of what you exactly do.