You are trying to use a memory card on your mobile and suddenly you see that it is not detected, that nothing happens. Problems recognizing the microSD card of a mobile are much more common than they seem, and if your phone is not able to read it correctly, it may not save anything on it or it will have less storage. Therefore, it is important to know what to do in these cases.
Assuming that this is new or that it is in good condition, that it works if you have tried it on other sites, but not on your mobile, you can fix it very easily with a button on your mobile. You don’t have to remove it, go through a lot of steps on a computer, or even download an external app to solve your problem.

We tell you what you must do to make any compatible memory card work with your mobile in less than a minute.
Reset the card from the settings
The button we are talking about is the one to reset or format the memory card from the same smartphone. Thus, you will not have to remove it from your mobile and do it from your computer, but you can do it from this function that is somewhat hidden , but you will easily find it by following the steps that we indicate below.
Of course, before doing anything you have to be clear that this will erase all the data , including your file system, photos and videos that you have there, and it will remain as factory, with a format that is fully compatible with your mobile and without adjustments. that prevent its correct operation. For this reason, if you want to keep something , you must insert it into a device that recognizes it correctly and save its data in another place, such as an external hard drive or in your computer’s memory.
How to reset the SD or microSD card step by step:
- Insert the new card
- Go to your mobile settings
- Then enter Storage (in Xiaomi you will have to go to About the phone first)
- Select SD card and your file manager will open
- Click on the 3 dots to go to Storage Settings
- It will take you to another section where you will find the formatting options
- Click on Format
- Confirm Format SD card
- Give ready when finished
- turn off your smartphone
- Remove the microSD
- put it back
- Turn on the mobile

Now you can start using your card in a completely normal way. Try it and you will see that it should work correctly.
One of the main reasons why your card did not work until then is that it had a different format than the one compatible with your mobile , so it is convenient to change it to a new compatible format. You can do it with this action. Most Android devices support FAT32 , although some may recognize other formats. It may also be that there was some setting or file that prevented it.
Normally it will be solved like this , and although it may seem like several steps, it will be completed in a few minutes if you restart the mobile, but if you have not succeeded, check that it is not damaged, dirty or defective.