I have Adroid Samsung Galaxy. Currently, when I attach it my laptop, it is not being recognized.?

My android samsung galaxy is not being recognized by my laptop for some reason. Its been more than 6 month since I bought it, and it just started that problem a week ago. Sprint said I have to pay 35 for fixing or replacement. I don't want to pay..
1- How can I solve this problem?
2- Is there other ways of transferring music and videos to and from my laptop with out the USB...perhaps by going over the internet on my android?
Thanks
 
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