Don't bother with 1fichier, it's absolute cancer. There are a lot of sites that link to Google Drive hosted files. Those are top notch. Convenient, fast, not full of spammy ads that try to get you to install viruses...
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Don't get cheap cards off of ebay. They are fake. They will appear to be the advertised size, but will error out at some point, wasting your time and losing your data. I typically get Samsung. Sandisk is good as well. With where prices are now, I would get a 256gb card. I have a 128gb that I got when cards were more expensive and I have to delete a game every time I want to add a new one. I'm using emunand though, so that takes up 30gb worth of space on the card.