SD Card Showing Wrong Size: Restore Full Capacity on SD Card Without File Loss

Stay calm if SD card showing wrong size on your computer. It might be a faulty SD card or virus infection. To fix the Micro SD card showing wrong size error, you should first format the SD card to its full capacity by using some SD card formatting tools as recommended here. Next, use EaseUS Data Recovery Wizard to recover data from the formatted SD card if you fail to create a backup in advance.

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Table of Contents

Issue: SD Card Is Not Showing Full Capacity

"I bought a SanDisk micro SD card a year ago, and it's 8GB. This morning when I transferred some photos from the SD card to the other on my Windows 10 computer, to free up some space, later I check its property, it shows around ~500MB capacity. That's not true. What happened? It should be as the original 8GB I think."

Typical reasons:

As far as we concerned, the issue of SD card showing the wrong size mainly owes to three aspects.

  1. 1. Cheap and faulty SD card bought from dishonest vendors
  2. 2. Incompatible with card readers or host devices
  3. 3. Infected by computer viruses

Recover Data SD Card Before Formatting

Disk formatting should be taken very carefully as we addressed many times, it's going to wipe all data out, leaving you a blank SD card in the end. If no backup is available, formatted data will be lost.

Therefore, we strongly suggest that you restore files from your SD card in advance. EaseUS Data Recovery Wizard is famous for data recovery from all devices, like HDD, SSD, SD card, USB flash drive, pen drive, external hard drive, and more.

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It allows you to recover all the types of files from your SD card. Meanwhile, if files corruption occurs, EaseUS data recovery program can repair corrupted videos, photos, and documents for you. 

Follow the steps below to retrieve files from the SD card. 

Step 1. Download EaseUS Data Recovery Wizard - the dependable SD card recovery software for Windows on your PC. Connect the SD card to your computer with either a card reader or by attaching the device that contains it. Launch the software so you can see the SD card from the disk list presented on the interface. Select the SD card and click "Scan".

select the sd card and click scan

Step 2. The scan process should run quickly to find the files that were recently deleted, items emptied from the Recycle Bin, and files that lost file names. During the course of scanning the SD card, you can start checking the results from the leftside tree-view pane, or simply use the Filter function to show up only the pictures, doucments, videos, emails and so on.

find wanted sd card files

Step 3. Double-click on a file will allow you to preivew its content. At last, select the desired files you wish to recover and click the Recover button to get them all back. When you're asked to choose a location to save the recovered files, do not use the SD card but another drive, to avoid data overwriting.

recover sd card files

How to Restore SD Card to Full Size

After excluding the causes of the mentioned incompatibility, to restore the SD card to its full size for a normal working state, you need to perform a quick format.

There are some good SD card formatting tools that are free to use on Windows 10/8.1/8/7. Pick up a handy one you prefer.

Warning
As formatting SD card will erase data on it, make sure that you have created a backup (refer to how to back up SD card before formatting). Otherwise, you can only use EaseUS Data Recovery Wizard to recover data from the formatted SD card.

Method 1. Disk Management

Step 1.Right-click This PC/My Computer > Manage.

Step 2. Select Disk Management under Device Manager, find and right-click on SD card and select Format...

format sd card with disk management to restore full capacity

Step 3. Rename and reset the file system of the SD card to NTFS or FAT32 as your need, follow the on-screen guidelines to complete the format process.

After this, you'll regain all the storage size of your SD card and you can use it for storing and saving files and data again then.

Method 2. EaseUS disk formatting software

This is third-party free partition software, so it requires you to download and install it on your computer, and then follow the guide to format the SD card.

Step 1. Right-click the hard drive partition and choose the "Format" option.

Step 2. In the new window, set the Partition label, File system, and Cluster size for the partition, then click "OK".

Step 3. You can see a warning window, click "OK" to continue.

Step 4. Click the "Execute Operation" button in the top-left corner, then click "Apply" to start formatting the hard drive partition.

 

Method 3. DiskPart command line

Step 1. Type cmd in the search box in Windows 10 and then you'll get the best match Command Prompt. Right-click on it and choose "Run as administrator".

Step 2. In the command prompt, type diskpart and press "Enter".

Step 3. Type list disk to list all the available drives and press "Enter".

Step 4. Type select disk + disk number ( for example, select disk 0) to select the SD card you want to format and press Enter.

Step 5. Type clean to clean the SD card you have selected and press "Enter".

Step 6. Type create partition primary to create a partition on the cleaned SD card and press "Enter":

Step 7. Type format fs=ntfs (or format fs=exfat) and press "Enter" to format the drive with NTFS or exFAT.

format sd card to full capacity using cmd 

Step 8. Type assign letter=drive letter (for example, assign letter=E) to assign a drive letter and press "Enter".

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Updated by Cedric

Cedric Grantham is one of the senior editors of EaseUS who lives and works in Chengdu, China. He mainly writes articles about data recovery tutorials on PC and Mac and how-to tips for partition management. He always keeps an eye on new releases and likes various electronic products.

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Written by Tracy King

Tracy joined in EaseUS in 2013 and has been working with EaseUS content team for over 7 years. Being enthusiastic in computing and technology, she writes tech how-to articles and share technical solutions about Windows & Mac data recovery, file/system backup and recovery, partition management and iOS/Android data recovery.

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