@Humbertico there are ATM machines in towns and cities along the CF. I take a debit card and withdraw cash every few days, usually enough for three or four days. Credit cards are good if you are staying in hotels in larger places, but mostly on the Camino cash is king.
It is worth doing some research to see what fees attach to your card. I now use one that refunds all the ATM fees charged by the local facility, and mine does not charge commission on the exchange rate into euros. One thing to know is that if you use the local bank (i.e. the ATM's bank) to do the transfer from your currency into euros, you will almost certainly pay more. So when the machine asks, say no. It is a bit confusing - sometimes the way it asks is (imo) deliberately misleading. Ask for a euro amount, not the equivalent in your own currency.
I hope I've got that right - if anyone can explain it more clearly, please do!