Support for m4r files (Iphone ringtones)

-- HikaShop version -- : HikaShop Essential: 4.4.2
-- Joomla version -- : Joomla version, 3.9.26

Hi!
We intend to sell downloadable products, including ringtones. Hikashop will not upload the Iphone format (m4r). Is this a Joomla barrier or a Hikashop one?
Can we work around this issue by uploading via FileZilla? Can they then be attached to the product in that way, and will the files then be downloadable?
Or are there other ways to remove the barrier and add the format to the approved list?

Hello,

It's configuration related : www.hikashop.com/support/documentation/5...nfig.html#main_files

Allowed files
List of allowed file extensions for the emails attachments and products files.

Regards,

That one was easy. Thank you so much