Lollipop 5.1 update broke my SD card

[lebatte]

I just updated to Lollipop 5.1 on T-Mobile, and afterward, I got a message saying my SD card is damaged and that it needs to be formatted. Great. So I followed the prompt and formatted the card. But after that, it still said it was damaged. So I put it into my computer and tried to format it to exFAT there, but even that doesn't work. It says "Unmounting disk; Couldn't modify partition map; Operation failed..."

I lost all of my data, and my card was broken by this update. This was an expensive SD card. Not sure what to do now.