Sansa Clip Zip and Synchronization

[Buttonguy]

I recently bought a Sansa Clip Zip, which I have so far been very satisfied with - not least because it has nice, tactile buttons rather than a fiddly touchscreen. But I have not yet figured out exactly how synchronization works. I use Windows Media Player. I have two questions.

1. How do I keep the media player from synchronizing every mp3 it can find onto my player. I don't want to have every piece of mediocre music that i have collected throughout the ages onto my player.

When in the synchronization window, I drag the files I want to synchronize into the list on the right. Those files are synchronized, but then it goes on, sometimes invisibly it seems, to synchronize a lot more. How do I prevent this?

2. How do I control whether the files are synchronized in the internal meory or on the memory card? Some of the files I have synchronized have been stored twice over, one for each memory device.

Thanks for your help.

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