WHAT SHOULD I DO WITH MICROSD CARD AND USB STICK?
Please state reasons for choosing one of the options.
1. Burn 'em. It is not worth risking your BTC for 20 bucks of disposables.
2. Wipe both. If so how?
3. You can use both because the process that you described does in no way, shape or form leave a trace that a malicious party could use to restore your master private key or seed?
I would like to LEARN what happens with such drives under Linux distribution and also recycle them in order to repeat the same process for another altcoin or a smaller BTC amount that I can use as semi-cold storage.
Or you could just install the Linux with encryption ON.
Then your Linux partition on the SD or USB will be one encrypted file and after you delete it and overwrite even a small amount of the data it becomes impossible to un-encrypt. It is essentially a damaged encrypted file for anyone trying to access it.
And even if you would not destroy the data, the Linux would still be encrypted and impossible to access.
This way you wont have to throw those SD:s or USB:s away.
Nice idea. Did not cross my mind. Now I only have to learn how to do that.