A couple of thoughts: Are you running the most up-to-date distro of SM OS? If not, I would say that it's definitely advisable to update. If you are running an older SM OS distro, are you allowing the FITSviewer to pop-up? If so, it could be a possible culprit (only for older releases). I used to experience crashes with older releases, but find the newest release remarkably stable (especially now that fitsviewer issues have been addressed).

A couple of probably unrelated thoughts, but things to consider for more reliable service long term. You want to be sure your power bank is providing enough juice to the Pi4. Spec is 3amps @5V. If you're sharing power from 1 bank to 3 devices, you should make sure that full spec power for all devices is capable of being delivered (even though nominal draw after boot will be less). Generally, I wouldn't trust the PI4's USB ports to power devices. Theoretically, yes, but practically and reliably, no. Ideally, you should consider a powered USB3 hub. Cheers, Doug

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