Is it possible to install Ubuntu on an external hard disk to be used as an alternative operating system? - Quora
GitHub - danielTobon43/ubuntuExternalHDD: This is a tutorial to install ubuntu 20.4 in an external HDD without removing the internal HDD in windows.
![Step By Step to Install Ubuntu 20.04 with Optional UEFI, Dualboot, and External Storage Instructions Step By Step to Install Ubuntu 20.04 with Optional UEFI, Dualboot, and External Storage Instructions](https://1.bp.blogspot.com/-z2WmuZs_RJs/Xq1CCUeAJ-I/AAAAAAAAbFY/IH1_ubdy0bg3l4GYmzRQ48B-IVj_zTYWACK4BGAYYCw/s1600/Screenshot%2Bfrom%2B2020-05-02%2B15-37-05.png)
Step By Step to Install Ubuntu 20.04 with Optional UEFI, Dualboot, and External Storage Instructions
![installation - Install 12.10 to an external USB hard drive automatically mounted at /cdrom - Ask Ubuntu installation - Install 12.10 to an external USB hard drive automatically mounted at /cdrom - Ask Ubuntu](https://i.stack.imgur.com/nLxrO.png)