In order to do that your motherboard should support boot from USB, Fireware or E-SATA. If it does, you need to go to BIOS options and choose option "Boot from USB device..." or something like that. E-SATA and should be available as any other hard drive. Same is true for Fireware.
Your Bios has an option to boot from your DVD Drive or external drive. If the internal or external drive has no boot sector or disc with a boot sector the system will not boot. You will need to go into your bios at boot time most often by tapping your delete key or whatever option your motherboard bios requires and change the option back to boot from your hard drive.
binary data, it can be on the hard drive, BIOS, or any external or internal device like a flash drive, built-in drivers
Some motherboards support boot from external USB drive amd/or eSATA. You need to check BIOS settings (the external drive should connected) to make sure that your computer is capable to do so. It the motherboard is capable then you can install operating system on the external drive (if it's an usb drive be ready for low performance).
hard drive
The fastest type of external hard drive would be a external 3.0 USB hard drive.
You should be able to select the boot order from the bios, check the order in the bios
You get another memory storage device, such as an external hard drive, and you copy everything on your hard drive onto the external hard drive, and keep it safe. That way, if your hard drive crashes, then you can take it out, and plug your external hard drive in, and work from that.
IDE 0 always has the designation C. Its a throwback to the days when computers were single or dual floppy drive only and they had (and still have) designations A and B. Hook up the external drive, go into the BIOS and select the external as the drive to boot from. Save the change and allow the computer to boot. Load the OS and it should defer to the external drive.
To completely clear your external hard drive: On Windows: Connect the drive to your PC. Open File Explorer, find your drive under "This PC." Right-click on it and choose Format. Select a file system (NTFS or exFAT) and choose Quick Format (or leave unchecked for a full format). Click Start to erase everything. For a more thorough wipe, use software like CCleaner, Coolmuster Data Erasure, or DBAN to overwrite the data so it can’t be recovered. On Mac: Connect your drive to your Mac. Open Disk Utility (Applications > Utilities). Select the drive from the list and click Erase. Choose your file system (Mac OS Extended or exFAT). Click Erase to format it. For secure erasure, click Security Options in Disk Utility to overwrite data. Just make sure you're erasing the right drive, because it's permanent!
---- # go to "my computer" # browse to your external hard drive # then open another "my computer" window # drag and drop the file(s) you want to the window displaying the external hard drive. ----
hard drive type
you can go to the service center of your external hard drive.