The phrase combines three distinct file-sharing jargon terms. Individually, each is neutral; together, they strongly indicate involvement with illegal content distribution , specifically child sexual abuse material (CSAM) . The acronym "CP" is the primary red flag.
Safely eject your SD card, insert it back into your 3DS, and power it on. Launch your game. If all steps were followed correctly, the modifications should now be active. You can change a single file in the romfs folder on your computer, re-insert the SD card, and see the change instantly in-game the next time you load it.