Sophos UTM (Formerly Astaro) - USB Installation

For those of you struggling with the latest Sophos UTM 9.3.x and attempting to install via USB stick, these links should help.

UTM Tweaking Guide v2.0 (work in progress)
https://www.astaro.org/gateway-products/general-discussion/53904-utm-tweaking-guide-2-0-a.html#post275323

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