Questions about downgrade

Discussion in '3DS - Flashcards & Custom Firmwares' started by rattleheadeth, Jan 18, 2016.

  1. rattleheadeth

    rattleheadeth Member

    Oct 24, 2015
    Cote d'Ivoire
    I have one 2ds in firmware 10.3U and I want to install CFW in order to play 3DS backups (.CIA).
    I have menuhax and a custom theme, I have to remove them before downgrading?
    What files I need to downgrade (I see a post day ago where show certain files cause bricks)?
    Do I lost some data after downgrading(like eshop games, saves, etc)?

    My english is not too good (almost bad), because I'm from Chile, and no, I don't use Google Translator. THANKS :)