How to buy bitcoin to my local harddrive? There are stories about people searchung dumps for their thrown away harddrives with bictoins with brazillions of money. I want to get such harddrive too :)
Is it possible nowadays? I.e. buy bitcois directly to my wallet, without any third party accounts?
I registered on CoinMarketCap and coinbase and looks like first site doesn't allow to buy bitcoins and another is maintaining it's own accounts with their security and 3rd party auth. But I don't want their accounts, I want my on my local selfcontained harddrive.
Is it possible?
I'd suggest you to:

Look into hosting your own bitcoin node.
Try using P2P non-custodial non-kyc exchange, you can find the list here.
You may want not to store your wallet on a hard drive. The suggested
solution is to own a hardware wallet