I’m specifically referring to microSD cards here, but I’m too lazy to type that every time and I doubt many people will think of full-sized ones anyway.
I got two 256GB SD cards (Samsung pro plus something) for Christmas, but I can’t think of a good use for the second one.
I have a Raspberry Pi, currently with a 32 GB SD card, where I’m gonna put the first one.
My phone has 128 GB of storage, which is already enough for me.
I’m considering putting it in my Nintendo Switch, but it already has a 64GB SD card, which is enough for the 2 non-physical games we have.
I plan on getting a Steam Deck once I can afford it, but that already has a lot of storage.
I don’t have a camera or drone or similar.
Selling is not an option.
A refund is technically an option, but I’d rather find a use for it.
Outside of games, you could use it in your desktop or laptop as a drive for different things. On my Mac, I use a 512GB for torrents instead of having it write to the SSD. I also have one that the Photos.app saves the Local iCloud Photo Library to.
Likewise, if any of your media apps let you set a default location, you can take advantage of it and have the apps and programs save content there, I do this for DVDs and Blu-Rays I get to have a digital copy.