Should I format my microcard?

The 16 gb microsd card I bought for my SansaClip doesn’t work when I put it in the player. The player freezes and none of the controls work until I take out the card. I know that the card is working because the store I bought it at then tested it in a cellphone. But when I contacted tech support, they suggested that I do an internal and external format of the player and the card. This seems risky to me, especially since we know the card is not defective. Any advice?

It’s not risky. Go for it.

Note though, that formatting will erase all user-added content, so make sure you have your music/files backed up on your computer or somewhere for re-transfer after formatting.