lulz i would love to see them try to put a slider on the micro sd cards. seriously dude, before you answer a question for someone try doing a little research on what kind of sd card the phone takes.
now onto the question at hand, driii your saying that you can see the images when its plugged into your computer, how are you accessing the phone? are you using windows explorer? android commander? or something similar, are you making sure you mount the sd card in android by pulling down the top menu and selecting connect to computer? if you have done all that and its still unable to write too the card your fs might be corrupt on the card and the only way of fixing that is pulling all your data off then formatting the card via the phone. if ya got any questions pm me