Hello Big capacity for a small price, but it will not be in a hurry ... Catastrophic write 5 mo / s read and feeble 15 mo / s. As a reminder, theoretically usb2 is 60 mb / s, but in general, it is around 30-35 mb / s. Count so about 40 minutes to empty the full 29.8 go with your key files 175 mb approx 3 hours and well to fill it. It remains a good buy because the price is convenient, especially in ntfs format, it may allow you to put files over 4GB! No problem when ordering, thank you amazon.