In Window > Information it only shows me the directory where the blockchain is downloaded, but the wallet.dat file is not there. I haven't found a Bitcoin folder in the /user/Appdata/Roaming folder where the wallet.dat is usually stored. It seems strange to me as I searched for wallet.dat in the whole C drive and only wallet.dat of Electrum is in /user/Appdata/Roaming. Bitcoin core doesn't show up.
Wallets are stored in the datadir (i.e. where the blockchain is downloaded) unless you specified it to go somewhere else with
-walletdir. It should be in
<datadir>/wallets. You can also look at the debug.log file. There should be a line that looks like
2020-01-07T19:00:30Z BerkeleyEnvironment::Open: LogDir=<datadir>/wallets/database ErrorFile=<datadir>/wallets/db.log
The path to the directory containing your wallet file will be everything before
/database and
/db.log