How do I make a "backup" of legal, medical, economic, etc- instructions in case I, indeed, suddenly die of any random cause on any given day? Things such as: DNR orders\status , stopping myself from having my organs harvested whilst Im alive (organ "donation"), stuff such as ,in my case, declaring I will NOT have a funeral or even burial, Im dead don't waste cash in me, let the State deal with my corpse, or what to do with my investments\ savings\ funds\ belongings.
Do I write it all on a pendrive, and tell a few people of high trust to just read that document if I die?

>>33250463 (OP)
Speak with an attorney or legal nerd or whatever. Write up a will, that's what you're describing.

>>33250463 (OP)
Will
Limited Power Of Attorney regarding health care
Limited Power Of Attorney regarding finances
Burial and/or funeral instructions

All in legal form and filed with an attorney, with other relevant people told who has them.

"In case of emergency" card in your wallet

Your will:

Have fun looting all my shit, you fucks. There's some money, too. Spend it on stupid shit however you please. Donate my body to science and don't hold a funeral service. Just have a little party or clusterfuck or visits with each other concerning my death. Oh, and try not to feel so bad about the porn collection. All the participants in that smut were dead inside anyway. Kinda like me lol.

Have a nice life and fuck off.

P.S. make sure the lawman doesn't fuck you on any of this.