Totally forgot about the wallet and what i used it for back then, but did not want to delete it, until i find out why it's there, and if it's bitcoin or what's on it.
Did you find it in a folder on your old drive called "Bitcoin" or was it just a wallet.dat in a "random" directory?
Given the age of the wallet files, and how much of the blockchain you've already synced, then it is likely that the wallets are either empty, ot it is also possible that they are wallet.dat's from one of the many altcoins that cloned Bitcoin Core/BitcoinQt (like Dogecoin, Litecoin etc).
If you make a copy of the wallet.dat's and open the copy in a text editor... (I would recommend
Notepad++) and then do a text search for: name
In amongst all the weird looking symbols, you should hopefully find some "name" records that look like cryptocurrency addresses... like this example:
Do they start with a "1" or another character?
In the example above, it starts with a "D" because it was a Dogecoin wallet.dat