SD are far too easy to wear out and RPi (?) is not a reliable platform. There's far more powerful, 1000x more reliable and cost effective options these days for a home node. If you want reliability you want to get rid of RPi, SD cards, and external attached storage. If you want safety for an LN node you absolutely need two disks. Past advice on this was dangerous because this approach used to be too expensive. Not anymore.
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