I have a recurring notification saying Preparing SD card checking for errors and then resetting.
Reset restarted the phone deleted some files trying to free up space. Tried opening my storage on my device settings it shows it on there as resetting as well can't keep the options menu open long enough to access any features. – SEMO VETSsupport.google.com
Many reasons can cause this problem, such as improper removal, virus infection, physical damage, and more. People who encounter this problem are at a higher risk of losing data. Therefore, you are suggested to recover files from the SD card before trying to fix the preparing SD card checking for errors problem.
How to Recover Data from the Problematic SD Card
MiniTool Power Data Recovery is a secure and functional data recovery tool. It provides a green and clean data recovery environment that protects your original data. Additionally, it contains plenty of feasible features, like Search, Filter, Type, and Preview, to improve the efficiency and accuracy of data recovery.
Even if you are new to data recovery, you can quickly master this tool with its clear instructions. You can download and install MiniTool Power Data Recovery Free to scan your SD card, checking whether it can find the necessary files. You can use the free edition of this tool to restore 1GB of files for free.
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Guide to Recover Data from the SD Card
Step 1: Connect the SD card to the computer and launch the software.
Step 2: You are suggested to scan the whole SD card under the Devices tab.
Step 3: Wait for the scan process to complete. Then, you can browse the found files by expanding the corresponding folders.
You can turn to the Type category list to check files according to their types. Additionally, you can use the Search feature to find a specific file by its name or set filter conditions to filter out unwanted files.

Step 4: Select all your wanted files and click the Save button. You should save files to other places since the SD card needs to be repaired then.
How to Fix the Preparing SD Card Checking for Errors Problem
Fix 1: Connect the SD Card to Other Devices
At the very beginning, you should check whether the SD card is corrupted. You can connect the SD card to other devices, like a computer.
If the SD card is recognized by the computer and works properly, the error might be triggered by your Android device which causes the SD card to work improperly.
If the computer can’t read the SD card, the SD card is corrupted.
Fix 2: Remount the SD Card on the Android Device
Usually, you get the error message: preparing SD card checking for errors on Android. You can try to remount the SD card on your Android device to fix this problem.
Step 1: Shut down the device and remove the SD card.
Step 2: Insert the SD card and restart the device.
Step 3: Go to Settings > Storage > Mount SD card. The options are presented differently for different devices, and you need to choose one with a similar meaning.
After these operations, you can check whether the error is fixed. If it still occurs, move to the next method.
Fix 3: Format the SD Card
Formatting can be the last method to fix this problem. Although formatting can resolve most logical errors, it will erase all the data stored on it as well. You are suggested to recover files from the SD card before formatting it.
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Then, follow the next steps to format the SD card for Android.
Step 1: Connect the SD card to a computer and press Win + E to open File Explorer.
Step 2: Shift to This PC on the left sidebar. You can find the SD card listed on the right pane.
Step 3: Right-click on it and choose Format from the context menu.
Step 4: You can set the File system and Volume label, check Quick Format, and click Start.

When the format process is finished, you can insert the SD card into the Android device.
Bottom Line
This is all about how to fix the preparing SD card checking for errors problem. If the problem is caused by the SD card, you should first rescue files out of the SD card with MiniTool Power Data Recovery.
Hope this post gives you some useful information on this issue.
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