More often than not, you need to format your SD memory card, Micro SD card, USB flash drive, external hard drive or other storage devices with an SD card formatter. Then, perhaps you will ask: why need an SD card format tool to do disk formatting? What can this tool do for you? Here, let’s look at some cases.
1. Erase all data on the SD card.
2. Change file system, for instance, convert RAW to NTFS/FAT32 or convert NTFS to FAT32 to use SD card on some devices, like PS4.
3. Restore SD card to the full capacity.
4. Repair corrupted, unaccessible or unrecognized SD card.
5. Remove SD card write-protection.
6. Clean up viruses.
SD card unexpectedly removed. Unmount SD card before removing to avoid data loss.
Solution #1. Re-insert SD Card
If your phone or digital camera keeps saying "SD card unexpectedly removed. Unmount SD card before removing to avoid data loss," you can try reinserting it. For instance, you can follow the below steps to reinsert SD card and restart your phone:
Turn off your phone and then remove SD card.
If your phone comes with a removable battery, take the battery out for minutes.
Turn on again and go to Settings > Storage to make sure the SD card is removed.
Turn off your device again, insert SD card back to its slot.
Now switch on to see the problem is fixed or not.
Solution #2. Unmount and Mount SD Card
Some users say that they can unmount and mount SD card from Settings option to fix this SD card keeps unmounting error on Android smartphones.
Go to Settings > Storage.
Click on Unmount SD Card then tap OK to confirm in the pop-up that appears.
Turn off your phone, remove the SD card and then insert it back to the device again.
Go back to Settings > Storage.
Click Mount SD Card button which will only appear while the card is unmounted.
Solution #3. Format SD Card
Sometimes, if the SD card is not formatted, you will receive an error message that says your SD card has been removed unexpectedly. To fix this issue, you should format your SD card. However, formatting will erase all data on the SD card. Now, what should you do if you don't want to lose your precious photos as well as videos on SD card?
Experienced users who successfully solved this issue will do the following two things:
1. Recover photos and videos from SD card.
2. Format SD card to remove out the unexpectedly removed error.
Now, I guess you might be wondering:
"How to effectively recover photos and videos from SD card that says removed unexpectedly error?"
Step 1. How to Recover Photos and Videos from SD Card
What you should do when your PC or phone can't read SD card?
Part 1. How to Fix - SD Card Cannot Be Read by PC
Step 1. Recover Data from A Micro SD Card That Cannot Be Read
Today, with rapid developing of data recovery technology, SD card data recovery is easy. Many data recovery programs are now made available in the market which can help to easily and effectively recover lost data. For instance, both MiniTool Power Data Recovery and MiniTool Photo Recovery can help to effectively recover SD card data without affecting the original data because of their excellent performance, high security and simple operations.
Step 2: Fix SD Card Can't Be Read by PC
Method 1. Format SD card Open Windows Explorer, right-click the SD card, and then choose "Format…" button.
Now, specify file system, volume label and check Quick Format, and then click on Start button.
After that, you will receive an error message that reads: "WARNING: Formatting will erase ALL data on this disk. To format the disk, click OK. To quit, click CANCEL." Here, as we have recovered lost data from this SD card, we just need to click on OK button to continue.
Finally, you can click on OK button when you get a message saying: "Format Complete." Thus, all work has been done.
If this method doesn't work, you can try running CHKDSK to scan for errors!
Method 2. Run CHKDSK to repair corrupted or unreadable micro SD card
Press Windows+X to open the Power User menu, and then click on "Command Prompt (Admin)."
In the new Command Prompt window, type chkdsk E: /f /r /x. Here you should replace E with your micro SD card letter.
Part 2. How to Fix - SD Card Cannot Be Read by Phone
Situation 1. SD chip is dirty.