Is there known issues with this drive with 64bit operating system,It doesnt want to format to NTFS I left it 14 hours & no progress,I put into my other PC that has vista 32 bit & formatted Ok & transfered a file ok,So I thought ok its formatted fine,I proceeded to install to my other PC with the 64bit operating system it sees the drive fine & its checked ok that its formatted to NTFS & 931 gb spare But when I tried to transfer a 7gb file it seems to hang or gives a time of 2hours to complete,Does anyone here have any answers?