Insert SD Card-Even if your SD card is correctly plugged into your Android phone, it may be unavailable at times. The SD card can be accessed by mounting it. The following instructions will show you how to attach an SD card.
Go to Settings > Storage in the first step.
On the Storage Info screen, select Mount SD card.
Try to install the app now after restarting your smartphone; it should work.
Choose your app's location carefully. It is recommended that users leave the app's location to the app and let it decide where it should be placed. It is usually preferable to keep your apps on your phone's internal storage.
Format the SD Card If you get the Android app not installed problem because your SD card is corrupted, you'll need to format it. However, please make a backup of the data on the SD card so that you do not lose any information. To format an SD card, go to Settings > Storage > Format SD Card.
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