Computer doesn't recognize the new sd card

It could be a corrupt card. It may happen if it's a "budget" SD card. Try it in another device, and if it doesn't work. exchange it for a different one.

 

If you bought it off amazon in bulk packaging, it may be a bad card. It happens, and I've personally made that mistake. If you bought it from a store, I would just exchange it and hope for the best. Once you mount the SD card, there should be no settings to change.

 

there is nothing you need to do.. other than mount the card, which it should do automatically. if you put it in a PC and it works fine. Most likely it is bad.

you can try to format the card in the phone or in a PC.. see if this fixes it.

other wise.. it needs to go back for repair.
Here is the good news.. Sandisk has lifetime warranty!

 

Not being sarcastic but did you try taking the sd out and putting it back in again