Hi

So I have managed to restore my HDD and found old 2010 wallet.dat it shouldn't be encrypted but it wasn't then I deleted it because I forgot that I mined BTC back then.
After 2years I managed to recover my wallet but befor I did that I installed bitcoin core on that same drive and download blockchain on diffrent drive when I look at properties it says creation date 2021 modification date 2010
Is it possible that it may be overwriten because before I manage to recover it I've been able to open it in text file and it was readable wallet.old
I remember when I had a piece of paper that some words were written on there and private key... I threw that paper away because I didn't know at a time it was from bitcoin there were 4 words written on there is it possible that I found encrypted wallet and could I decrypt this wallet with those 4words or back in the day bitcoin used 4word passphrase? or if anyone knows where can I get more information about bitcoin from 2009-2010?

Thank you