How is a write-protection removed from music,pictures,etc from a computer? ?

It sounds like the memory card might be what is write-protected. If you look closely at it you should find a little switch on the side that you can toggle, and you should then be able to write to it.

I am assuming that you mean copyright protection. If you bought your music and videos from an online store like itunes, then it is very likely that the music and videos came with drm (digital rights management) copyright protection, to prevent people from making copies of it and selling it for a profit. However, this drm also restricts you from playing your music and videos on devices that don't support the drm. With itunes for example, when you bought music from the store, it would only work on an ipod, and no other device. I say "bought" though because recently itunes has followed amazon's example and gotten rid of the drm on the music they sell, although it is still present on the videos. I have no idea why the pictures wouldn't work because those should not be copyright protected, the only explanation I have would be that they might not be in the right format.

Anyways, there are many different ways to circumvent the copyright protection. I am going to use itunes as an example again because I have the most experience with them. As of a week ago, itunes will allow you to remove the drm from their music but for $0.30 a song (are you f&*@ing kidding me apple). Another way to get around this drm is to burn your music onto cds and them import them back into your library, however this will result in a loss of sound quality. Other ways include stripping the drm such as in fairuse6(google) or recording the music as it plays in the background(audacity). If you need help, or your music is not from itunes and you need help with that, please add additional details to your post or email me at eschems@gmail.com. Hope this will help you.