PC not reading SD card

[1rj2]

I have SanDisk 16gb card I put it in my phone and used it as a internal memory and it didn't work, Know I'm trying to format it from my pc but it doesn't appaer on the list of devices...

 

[atljsf]

is it new or old?

can you format it from the phone?

what adapter are you using to read the card on the pc?