Boot from external hd

But is booting from hd possible? I have an external ssd but I can’t install the operating system backup on it. Only Android?Thanks

What do you mean “can’t install”?

I tried to install a backup or directly Ubuntu on HD,but any HD attachment to the USB is not recognized.The usual HD is regularly recognized by the Rock to installed OS

Ugh, use google translate please.

Not recognised by bios?

No He sees it as Android

…please, explain normally ehat you did, what kind of problem you have and what do you wanna achieve. Right now it’s more like random words, and not explanation

I simply wanted to use an external HD as a boot with the os. But I can’t install any os because the bios sees it as android.

Here is a hint of how it could be done. For advanced users:

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