Why Won T My Microsd Card Work In One Computer While It Does In Another

I want to transfer my files again, but it’s not showing up in “devices with removable storage”. It makes that little beeping sound when I remove it, though. I went to Device Manager, and it’s not showing up. I tried scanning for hardware changes, but it’s taking forever in a usually fast computer. I tried restarting it, but that didn’t work either. I doubt it’s been damaged, since I kept it in a little plastic case ever since I bought it. Plus, it’s working perfectly fine with my other computer. It’s not write-protected, either. Halp?