Hello, Thank you for the responses.

Yes I am sure that this is not a random found wallet in some shady places of the internet.

The Blockchain is fully synced, I waited a few days for that. To open a wallet.dat file it usually takes ~10hours.

“It's likely that your mined coins' blocks weren't accepted by the consensus blockchain and thus never came into existance. This can explain the zero balance when there is no spending transaction found on the whole blockchain.”

This caught my attention. So there were some actual Bitcoins mined but it did not got “verified” by the blockchain, to say it in simple terms?

Is there any possibility to do that retrospectively?

Hello everyone!

I found some wallet.dat files. I already downloaded the Bitcoin Core and also synced the whole Blockchain.

After syncing one wallet.dat file, it states that the Balance is 0.

The interesting part is, on the right side under Last Transactions, there are several transactions  with dates and minutes, a [+XX.00000000 BTC] statement and a “mining” symbol. Under the date there is an empty bracket ().

Can I somehow get access to to those mined BTC?

I am quite a Newbie, so don’t be to harsh on me.

Thank you in advance! :-)