I have some old wallets (wallet.dat) on my PC, but I do not remember if they have still balance, I do not even know if the wallets are from bitcoin or bitcoin cash.
One working way would probably be:
For each wallet.dat file:
- put wallet.dat in bitcoin data folder
- start bitcoin core
- redownload / rescan whole blockchain
- if found positive balance, send to new wallet or whatever
..then do the whole procedure with bitcoin cash client.
This would take me days, if not weeks. Isn't there a simpler way?