My MacBook does not recognize my Buffalo hard disk

My MacBook does not recognize my Buffalo hard disk

If it is an external hard drive, one possible cause is a corrupted driver. Normally, when you connect a perfectly working external hard drive to a computer without installing its driver, the same thing will happen. Your computer will not be able to recognize the drive. To try fixing it, uninstall the software for your external hard drive to remove the driver.

Restart your computer when you are prompted. After that, connect the external hard drive to your computer then install the software back. It will restore the accessibility of the external hard drive to your computer and should fix the problem. In case the external hard drive is still unrecognizable, try connecting it to a different computer then see what happens.

If the external hard drive is really corrupted, it should also be inaccessible when you connect it to a different computer. If this happens, I guess you should just format the external hard drive. Also, try creating as much partition on the external hard drive so that when it gets corrupted again the entire drive will not collapse and you can still use it by accessing the other working drive letters.