Here is my BTC wallet from years ago. I backed up the files, but there is a dat file that was in a hidden folder in windows that had the actual keys. I reformatted the hard drive and still have it. If you want to try to recover it I’ll give you $300,000 after it is recovered. https://www.blockchain.com/explorer/addresses/btc/1PUpdJiTLL6fEGbzMQtqSVmY24D3LdntWt