- Official Post
The USB/SD Creator app will write to any removable device. Some USB > IDE/SATA adaptors might not show up as removable, but the majority do and you should be able to write the image direct to the drive. The "USB" (or drive) should boot into installer mode by default, but it you hit any key at the syslinux prompt it will stop boot and you can type "run" to "USB boot with persistent storage" but it's not USB specific, it just creates a persistent /storage partition and changes the boot config from "installer" to "run" permanently. You might need to fiddle with boot settings to enable/disable UEFI or legacy boot support and in rare cases the BIOS/firmware might object to syslinux in which case you can always install grub as an alternative. The grub boot config is slightly different but extlinux.conf has all the details you need to set something up. As a general rule systems with problem firmware tend to be a bit too old and since (as a distro) we don't focus on old hardware at all, you may find drivers are missing.