Then presumably the trash men would come and pick it up and take it to the dump, or whatever normally happens to your trash.
drag them to trash, empty trash
Drag the drive icon to the trash just as you would a CD.
At the worst both drives will get selected at the same time and trash each other's data.
Probably the best answer is "give it to the IT department and let them deal with it." Any drive to be discarded which might contain sensitive financial (or other) information should be multiply-erased if possible, and destroyed if not.
Rub a strong magnet over the entire surface of the hard drive, or to be absolutely sure, physically damage the hard drive with a nail and hammer. (Text book)
Your hard drive will be more prone to be broken. Reformatting hard drive needs not to be very often. Hard drive is reformatted once there is no more chances of recovering it from corrupted files, virus, bad sectors, etc. When you format your hard drive, you will certainly feel that your computer is slowing down due to the hard drive being read uncomfortable for the system and later on your hard drive will be broken.
When you delete files and move them to the trash bin (or recycle bin), they are not immediately removed from the hard drive. Instead, the data remains stored on the hard drive until it is permanently deleted or overwritten by new data. The operating system simply marks the space as available for future use, making the files recoverable until that space is reused.
Nothing should happen because you shouldnt been modding the hard drive section, or the hole xbox.
If the Hard drive is IDE (40 pins on the back) you would configure the primary hard drive as Master and secondary hard drive as Slave using the jumpers on the back of the hard drive.
The fastest type of external hard drive would be a external 3.0 USB hard drive.
The percentage depends on the size of the hard drive. You would need to know the entire size of the hard drive to do the simple math. 4000000kb equals 4Gb.... now if your had a 100gb hard drive, that would add up to 4%.
I would get an external 250GB hard drive for movies and pics. Or if you backing up your whole Master drive a 1.5TB External hard drive world be the best.