Hello

One day, a few years ago now, I had ~100 bitcoins on Old Usb Key.
I didn't remember having them, as I'd had them at the very beginning. This USB key was lying around in a drawer, as I imagine a lot of people have

I remembered that I had a Bitcoin wallet not long ago and I tried to find my USB key, without success.
This story makes me sad, because if I'd known, I'd have been more careful!
Moral: be careful with your stuff, even if it's old :p
It is very sad to read your story. Also, your issue is so important now that not having wallet security or not caring about wallet security is something you will regret later. Your 100 bitcoins are currently worth millions of dollars while the security of bitcoins on the crime USB drive is not working well, much to your regret. So preserving the security system of the wallet is very important thing that everyone should take seriously.