HPLC separations involve both the mobile phase (a liquid) and the stationary phase. (usually materials of varying hydrophobicity chemically bonded to a solid support). In. contrast, GC uses the mobile phase only to carry the analyte through the column.
Pulling Data off old HDD. You can get an IDE-to-USB interface, then connect it to your desktop via USB cable. It doesn't matter whether there's an operating system on the hard drive, it will be formatted as an NTFS file system, you just navigate to the files you want and copy them to your desktop's hard drive.
Connect a sufficiently large external hard drive to your old computer and drag-and-drop (or copy-and-paste) all the files you need from your old computer onto the drive. Disconnect the drive from the old computer, connect it to the new computer, and move the files onto the new computer.