why my sd card wont show up on my nokia lumia windows 8 phone

Solution
Try cleaning the card with some alcohol and reinsert it. Make sure it actually works on some other device. For example, can you read it on a PC using card reader or in a different phone? Is the card formatted to FAT32? Reseat the card several times. If nothing else helps, you will have to hard-reset your phone. Make a backup of all your important data before you do that. But in most cases, this helps:

a) Touch the arrow icon on your start screen.
b) Go to "Settings".
c) Choose "About Phone".
d) Choose "Reset your Phone".
e) Choose "Yes".
Try cleaning the card with some alcohol and reinsert it. Make sure it actually works on some other device. For example, can you read it on a PC using card reader or in a different phone? Is the card formatted to FAT32? Reseat the card several times. If nothing else helps, you will have to hard-reset your phone. Make a backup of all your important data before you do that. But in most cases, this helps:

a) Touch the arrow icon on your start screen.
b) Go to "Settings".
c) Choose "About Phone".
d) Choose "Reset your Phone".
e) Choose "Yes".
 
Solution