Hi. I have a sata 2 HDD from my old PC with some important information there. So i decided to use it like external. It capacity is 250 GB. I bought an external case for HDD sata to usb. The model of the case is Cooler Master Xport 351. When i connect it to my iMac mid 2010, Mac OS show me this message. What must i do to be capable to use it normally? I forgot to mention that the file system of the HDD is NTFS.