ATTENTION! BIG PROBLEM !!! I ordered 2 2 Sandisk ULTRAII 120go The ssd have had the same problem: Unable to recognize them on the USB interface. It took lordi open and connect directly lordi the disc. The disc is recognized BUT WITH A CAPACITY OF 7.22 GO. After having contacted the support of Sandisk jai including that he had to remove the partitions and reformat the drive. Fortunately javais yet old disks with win98. Procedure: Disconnect all disks except Sandisk insert the diskette with command (win98) type command use the program PZAPPER program that erases all partitions Fdisk and then finally Format After all these maneuvers Sandisk appears 120go and is operational (I use winXP S3) Good luck but if you do not know "tinker> a computer I do not recommend buying Sandisk