how do i change a windows drive to a data drive without losing the data on the disk? i am trying to use a ssd to be boot dive with windows 10 on it and another sata drive that has windows on it as a data drive. I just want the data on the sata drive and not boot from it. somehow the bios settings keep using changing to use the 100mb system stuff that is usually a hidden partition still and it shows up in file explorer with a drive letter on the sata drive whilst booting the os from the ssd greatly reducing the performance of the pc. Any help or ideas are appreciated, thanks! Hope it is understandable the issue, please ask for clarification to see if i can explain further if needed!