Saving the entire blockchain in my computer is taking mi a lot of space. I looked in this forum for a solution and I saw that there was an option to prune the node and save a lot of space. I followed the instructions, I went to the Bitcoin data directory, I created a file there and called it "bitcoin.conf" and I wrote "-prune=1100" in it. Nothing I expected happened, the space it took remained the same, it only started downloading a new blockchain called "testnet". Have I done something wrong? And how can I fix it in order to save space? My version of Bitcoin Core is v0.14..2
PS: Latter, I have discovered that, in fact, I have three Bitcoin data directories, and suddenly I have doubts about in which of them shall I place my "bitcoin.conf". Is having three directory data how it shall be? And in which of them shall I place my "bitcoin.conf".