Are there some recommended approaches for running Bitcoin Core on a laptop with constrained storage capacity? Is it possible to use an external hard drive as the data directory (datadir)? How does this setup work, and would I need to pay attention to?

Thank you in advance to everyone who responds to this question.

Is there any practical advantage in generating a hardened child key from an unhardened parent key within the framework of BIP32? For instance, are there real-world scenarios or applications where this specific key derivation approach is beneficial or commonly utilized? Apologies in advance if this is a silly question.

[ban score]

I searched for information about ban score, but was still confused. Could you kindly provide insight into how the ban score algorithm calculates the ban score attributed to a node?  Specifically, I'm interested in understanding the criteria for misbehaviors that trigger the ban score algorithm and result in a ban score being assigned to a node.  Additionally, I would greatly appreciate guidance on where to access official documentation or resources to learn more comprehensively about this topic.  Any views or responses will be greatly appreciated.

I'm curious to understand the limitations concerning the repetition of the same set of private keys within a multisig wallet. Specifically, if a 3 of 4 multisig wallet is established, could it be feasible to have two of the four keys identical? This way, withdrawals would require the signature of one of the remaining two unique keys. Your insights on this matter would be highly appreciated.

I've been diving into the fascinating world of Bitcoin scripting and have come across something intriguing: MATT opcodes.  While I've done my fair share of research, I'm finding it a bit challenging to fully grasp their intricacies and applications.

Any recommended resources such as articles, documentation, or tutorials that delve deeper into MATT opcodes would be immensely helpful in furthering my understanding.

Thanx