Help My SD card is pissing me off.

So the other day I downloaded some software from the universal updater app (I dont remember exactly what I downloaded) whatever i did download though it decided to delete all of my homebrew apps with a blink of an eye and all of my 2ds games. I really need help because this was my childhood 2ds xl. I'm pretty sure all my save data is safe but other than that I can't do anything. I also tried the finalize files and it just says the file is corrupted. And GET THIS!!! when I try to re-download and copy the finalize.romfs file to the root of the sd card, my chromebook refuses to edit the sd card. It says the directory is unusable. I'm so upset right now 😤