Simple, need that SD card formatted- Don't require anything fancy... you'd setup that SD card to boot a R Pi project... you've since discoverred how to boot offa SSD instead- oh those lovely few seconds of boot saved- hey they add up! Alright this was supposed to be a post to just share a quick link... to a basic SD card formatter... So, here we are... Format away. https://www.sdcard.org/downloads/formatter/sd-memory-card-formatter-for-windows-download/ How much more legit can you get than a SD card formatter from... SDCard.org. Any SD card experiences to share? Would love to here 'em. Leave a comment. Oh, if for whatever reason that SD card is toast...did you try to use it on a Pwnogatchi project? Some reason, certain versions of the firmware, I'm gonna say all the new versions. "Kill": SD cards... afterwards, can't use them for anything... can't re format, can't erase... un-usable. Not really. If you truly require use of that SD card, get y...