On your Mac, choose Apple menu Restart, then press and hold the D key while your Mac restarts. When the Apple Hardware Test chooser screen appears, select the language you want to use, then press the Return key or click the right arrow button. When the Apple Hardware Test main screen appears, follow the onscreen instructions. How to Scan a Drive for Errors on Your Mac By Mark L. Chambers El Capitan’s Disk Utility is a handy tool for troubleshooting and repairing your hard drive (whether you’re noticing that your Mac has slowed considerably or you have problems opening files and applications). You can find it in the Utilities folder within the Applications folder.

Before checking and repairing disk errors, you can see the selected disk whether it can be verified or repaired by clicking ' Info ' from top menu. Step 3: Run First Aid to check and repair disk errors. Click the First Aid on the top menu and tap on Run button to launch First Aid on Mac.

How to check SD card for errors

'I have a microSD in my Samsung phone, and it somehow got corrupted. My phone says that I need to scan the SD card to check SD card health and fix errors. But I am not sure how to do this. Can anyone help?'

Check SD card health overview

The longer you use an SD card, the higher the possibility that errors, bad sectors, or corruptions occur on the device. It will finally cause errors like memory card not formatted, SD card not recognized, SD card read and write error, SD card is damaged try reformatting it, blank SD card, unable to format SD card, SD card data not showing or become shortcuts, SD card shows 0 bytes, memory card locked, SD card is not accessible the volume does not contain a recognized file system, etc..

If you are caught in one of these issues, you need to scan and check SD card for errors to fix the card and make it work properly. You can check SD card health both on your Android phone and PC. Here we mainly focus on how to do SD card health check because your PC works better in repairing damaged SD card.

Check My Mac For Errors Free

Check and repair SD card for errors in Windows

1. Open Windows Explorer, right-click your SD card, go to Properties -->Tools --> Check now.
2. Check both 'Automatically fix file system errors' and 'Scan for and attempt recovery of bad sectors'.
3. Press the Start button to let the Check Disk to scan the SD card and correct any errors it finds.

Windows built-in SD card tester can quickly check SD card for errors, and it works at most times. If the error can not be repaired in this way, don't fret, you can try to use a free third-party disk manager to check SD card health and repair corrupted SD card.

Check SD card health Windows 10 with a free partition manager

EaseUS Partition Master Free is a superior tool that provides the most full-around solutions for disk and partition management.

The outstanding features of EaseUS partition manager:

Check SD card bad sectors with the SD card checker utility
Resize/move partitions, create, format, delete, and merge partitions
Copy and clone an entire disk to another even the target partition is smaller than the source
Convert a logical partition to primary or primary partition to logical, FAT to NTFS partition, MBR disk to GPT, or GPT disk to MBR
Completely wipe out all the data on the hard disk to prevent information from being leaked or recovered

Now, download this free SD card health check tool. Then, follow the steps below to check SD card health and repair the corrupted SD card file system. You can also use this method to repair corrupted HDD/HDD without losing data.

Step 1: Open EaseUS Partition Master on your computer. Then locate the disk, right-click the partition you want to check, and choose 'Check File System'.

Step 2: In the Check File System window, keep the 'Try to fix errors if found' option selected and click 'Start'.

Step 3: The software will begin checking your partition file system on your disk. When it has completed, click 'Finish'.

How to Format SD card to check and fix bad sectors without data loss

Checking file system can repair a corrupted SD card caused by a damaged file system. If this approach doesn't work, you can format the SD card to fix the errors and use it again.

Important: Formatting SD card will cause data loss. To scan and check SD card errors without losing any file, we highly suggest that you use a professional data recovery software to recover data from corrupted SD card at first. You can use EaseUS free partition management program to format the SD card without effort.

Step 1: Open EaseUS Partition Master. Find your SD card and right-click the partition you want to format and choose 'Format'.

Step 2: Set a new partition label, file system (NTFS/FAT32/EXT2/EXT3), and cluster size to the selected partition, then click 'OK'.

Step 3: Click 'OK' on the pop-up window to continue.

Step 4: Click the 'Execute Operation' button on the toolbar, then click 'Apply' to start formatting your SD card.

Useful tips for SD card health check

Format corrupted memory card will erase all your data, so make sure that you have made a backup. And if you can not access the card, you can try EaseUS disk data recovery to check if your files are recoverable.
If the errors cannot be are repaired even you have reformatted the SD card, you might need to buy a new card.
Regular backup your files in case that errors or corruptions occur on your SD card again and cause unexpected data loss disaster.

To sum up

EaseUS Partition Master Free offers you the most comprehensive methods to check SD card health and check the file system. What's more, you can use the disk surface test feature to check bad sectors on the SD card. All the bad sectors will be marked as red. You can know the health of your SD card by the number of bad sectors.

Check SD card health frequently asked questions

Here are a few more questions about the SD card health check. Read them if you are interested.

How do I check my SD card conditions?

You can use an SD card surface tester to check SD card for errors. EaseUS disk management software has a Disk Surface Test function to help you check physical bad sectors on your SD card in one click.

How To Check For Disk Errors

How do I know the actual capacity of my SD card?

You can know the actual capacity of your SD card in the following way:

Connect your SD card to the computer. Right-click the Start button, choose Disk Management. Here, you will see all the hard disks displayed, including HDD, external hard drive, SD card, or other storage devices. You can check the SD card size and storage usage.

How do I check the lifespan of my SD card?

Current technology combined with normal usage can usually make smart cards have a service life of 10 years or more, allowing consumers to update their devices for many years and reduce consumer electronic waste.

El Capitan’s Disk Utility is a handy tool for troubleshooting and repairing your hard drive (whether you’re noticing that your Mac has slowed considerably or you have problems opening files and applications). You can find it in the Utilities folder within the Applications folder. From Launchpad, click the Utilities folder and then click the Disk Utility icon.

In the left column of the Disk Utility window, you can see

The physical hard drives in your system (the actual hardware)
The volumes (the data stored on the hard drives)

You can always tell a volume, because it’s indented below the physical drive entry.

Any CD or DVD loaded on your Mac
External USB or Thunderbolt hard drives
USB flash drives
Flash drives (like thumb drives) are external hardware devices that you can add to your Mac for additional storage room or as secure places to back up your data.

Here, you see one internal hard drive (the 1TB SATA entry, which is selected) and one USB external hard drive (the Toshiba entry). The hard drive has three volumes (Wolfgang, Ludwig,