frankly inadvisable

I 1000GB product.
at first, no obvious problem well recognized either by Vista or seven.et download speed is really good (-to 1.30mn for 1 film). but after using multimedia, panic !!!
the sound is super bad, and after several months of use (not really heavy, I did that since December 2009), he began to row enormously: it slows down the image, stops, or worse, crashes.
and the sound is increasingly low.
bad product.
I recommend