Sometimes your SD card in your Android phone may become corrupted. This may cause many different issues, usually resulting in the PC sync being unable to perform properly or start at all. The next thing to do is to format SD Card on your device.
Now and then your phone’s micro SD card stops working correctly and has to be formatted. Just like a smartphone that needs a factory reset to try and get rid of weird behavior, an SD Card needs a fresh start by formatting it.
If you are thinking of selling your Android device and don’t want your information to go with it, formatting the SDcard will also come in handy.
How To Format Your SD Card For Better Performance
This tutorial will explain how to format SD card of your Android phone. This simple process will ensure that your memory card is compatible with your device.
How To Format SD Card On Phone- Android
Follow the steps below to repair or reformat SD card on your android phone.
Back up your data before you format SD Card
===> Connect your Android device to your PC and mount it as a disk drive (i.e. mass storage mode).
===> On your PC, open Computer or My Computer and find your SD card/removable drive
===> In the Windows Control Panel, in Folder Options, in the view tab, make sure it is set to show hidden files/folders
===> Select Ctrl +A to select all files and folders in this drive and then right click and select Copy (Ctrl + C)
===> Paste all of those selected files into a new folder you created on your Desktop by Ctrl + V
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Format SD Card on Android
Start on the home screen of your device and tap on
===> Menu, then tap Settings. 
===> Scroll to SD and Phone Storage.
===> The option for Format SD card will be grayed out, but it should still be active.
===> Tap on Unmount SD card and then validate. Here you will see the “Format Card” option and the “UnMount SD Card” option.
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===> To get started, just tap on the first choice, but if it is grayed out, you need to tap “Unmount SDcard” first.
===> Next, tap on Format SD. Follow the on-screen procedure to complete the formatting.
Can a Damaged SD Card Be Formatted?
Yes, it can. You just need to insert it like you always have and turn off your phone. Turn it back and follow the formatting steps listed above.
When you are done, you should not see the damaged SD card message, and you should be able to see how much memory it has.
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