Wav to WAV

When exporting tracks from Cubase in order to import them on my Tascam DP24SD there seems to be an issue with the file extensions. The Tascam might be unable to recognize a file with a lower case file extension. Is there a simple way to convert the file extension to all caps? wav to WAV?
It’s just one file every 14 days or so. No need for a method that lets me mass-export a bunch of files or anything like that.
Thanks in advance.

Just rename the file in Explorer / Finder ?

Just right click and rename? I think I already tried that but I might be wrong

To rename multiple files (extensions too) I recommend Bulk Rename Utility.

Yes, right click/rename….you need to have extensions showing to be able to change the extension of course