A couple of simple questions

I have two simple questions that require your help:

1) What do you use to store / organize miniDV tapes ? I mean, is there any kind of miniDV storage like there is for exemple for CDs and DVDs to organize and store them ?

2) I'm interested in buying an external mic for my sony camcorder (DCR-PC330). The mic model is ECM-MS908C (see attached file). Any comments / opinions on this external mic ? Would the sound be much better ?

Thanks, in advance.

Best regards