Can we make bootable external hard drive?

[Justvicks]

I made the hard drive of my laptop to external hard drive and want to put a bootable hard drive alternative, help me!

[ApPy10]

If your external HDD is connected to USB, you can only make it bootable if your motherboard can boot from a USB port.

[T.J.]

Yes, it depends solely on your motherboard, if it allows to boot on a USB peripheral so it's good.

Have to see whether after the OS in question agrees to be installed on a USB drive, even with linux it is not necessarily the case without small change.

[unidentified]

You can use this method: How to create a Bootable USB Key?