I moved 1TB of data from an NTFS formatted external to a mac external. Then I ran the program called MacInstall, which is found inside the emptied Seagate FreeAgent NTFS drive. I was trying to convert the emptied drive to mac format. But the program unexpectedly converted the other drive with all the data. It was already a mac formatted Seagate FreeAgent Mac drive. I've lost 1TB of important data. When I ran Seagate MacInstall, it took just seconds for the format to be completed. So I guess it was just a quick format. I don't know if it also changed the type of the format. It was already mac formatted, but there may be different types of mac formats. I don't know. I need to convert the process. It is very important and quite urgent. If I can't find a software solution, I can also try one of those laboratories who charge thousands and rescue almost everything. Here's a detailed explanation of what happened: There were 4 external hard drives connected to my iMac. 1. 1.5TB FreeAgent Mac via FireWire800 (Mac format) 2. 1TB FreeAgent Pro via FireWire400 (NTFS) 3. 1TB FreeAgent Pro via USB (NTFS) 4. 400GB Seagate Barracuda in an enclosure via USB (NTFS) I MOVED all my personal archives from number 2 to number 1. Then I ran the MacInstall from the desktop drive created by macinstaller.dmg found inside number 2. It has just formatted the wrong drive, number 1 (with all my archives) instead of number 2. I don't know what to do now. This is very important and I need help immediately. I guess it was just a quick format as it took only a few seconds. There must be a way to restore everything on drive number 1. But what is it? Please help!..