I want to install Endeavour OS on a portable SSD. Does anybody knows if it is possible to do it. I want to use the SSD on diferent computers without any problem (If any computer crashes and I need to save it).
If rescuing/repairing a broken system is your goal, you would just need your live EOS usb. That should cover you.
Despite this, if you want a “full” installation of the OS to be bootable on different devices, you would need to make sure to have the bootloader’s efi binary in the removable boot path. Like for example:
/efi/
├── EFI
│ ├── BOOT
│ │ ├── BOOTX64.EFI
systemd-boot’s efi binary is copied automatically into that location.
For grub you would need to add --removable to your grub-install command.