I bought this key due to its capacity and its price, it was for me to find a large capacity media to send images scanned my son, every photo "weighing" an average of ten mega bytes. This key perfectly fulfills its task. However, the write speed is not really his forte. While in the transfer USB3 is infinitely faster here for fifty megabytes, transfer lasts more than 6 hours. This, in my view, restricts the use of the key to a one-time use.