Solved! Can someone help me, my sd card had an error

Aug 25, 2021
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So I had installed the external sd card to internal sd card in xiaomi A9, but for some reason nothing happen to my storage my internal storage only 24 GB but after I installed the sd card to the internal it didn't increase can someone help
 
Solution
What the computer tells you it has left on the hard drive is just that, on the HARD DRIVE. It does not take into account the SD card or even a hard drive adapter plugged into a USB port.