Some SD cards will not be supported, what was the make, model and size of the SD card you have installed and doesnt appear to be working?
With regards ***** ***** original SD card what size was this?
The phone should have a good 6 or more GB internal memory, if you just taking pictures it shouldn't be an issue, I would suggest you look to factory reset\wipe the phone as there sounds like there are alot of apps taking up space on the phone, which will get you back in a position where the phone can be used to take a few thousands pictures on the SD card.
IS it a red or yellow colour SD card?
Ok so this is the Evo Plus, that model is compatible with the phone.
What error message do you get when you try and access it from the phone?
Ok and you have restarted the phone with the new card inserted?
In terms of the security code try the default code 000000
If the card was formatted in an unusual way that may be a reason, or maybe the card is faulty.
Normally the phone would try and reformat the card if it cant read it.
Are you able to test the SD card in another device (camera, tablet or phone)?
Hi Bernadette, This is Nathan now.
Insert the sd card in your Moto g phone and format it from the phone. Once done then reply for further assistance
That's great Bernadette that your problem is resolved. Please rate my service positively if you can by clicking the 5 stars present on the upper panel. Thanks and have a good day
Hi Bernadette, How did things turn out?