I have a ZTE Z752c,android version 4.4.4,FCC id:SRQ-Z752c with a 16g SD card and it wont let me download anything to it.It say

[Danny Boy Jones]

My ZTE z752c won't let me download anything to my simcard 16 g,it says my device doesn't support this action

 

[webworkings]

That would be because it doesn't.

Your phone runs KitKat. Any OS prior to Marshmallow, doesn't allow for downloading and installing directly to the SD card. If you can (but that is a stretch) upgrade to Marshmallow, you might be able to then make it work. "Maybe".

See, only in Marshmallow can you set the SD card to "internal" rather than the standard "external'. Which should be done with a blank card, as it will erase anything on the card when it sets it to "internal".

The only other way I know of to make it work is through rooting a phone. Which I am not one to ask about. If you wish to consider rooting the phone I suggest you post in the "Rooting, Jailbreaking & Unlocking" forum http/www.tomsguide.com/forum/forum-117.html as they can help you there with that.