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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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

How to Restore SD Card to Full Size

When you exclude 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 SD card to NTFS or FAT32 as your need, follow the onscreen 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 on your computer, and then follow the guide to format the SD card.

 

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

Format Hard Drive Partition - Step 1

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

Format Hard Drive Partition - Step 2

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

Format Hard Drive Partition - Step 3

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

Format Hard Drive Partition - Step 4

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".

How to Recover Data from Formatted SD Card

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.

With no backup at hand, at the same time, lost data after formatting. Calm down for a second. Now try to download EaseUS Data Recovery Wizard and follow the guide to perform SD card formatted data recovery.

Step 1. Run SD card recovery software and scan the card.

Launch EaseUS Data Recovery Wizard on your PC and select your SD card. Then click "Scan" to start finding lost data on your SD card.

select the sd card and click scan

Step 2. Check found SD card data.

After the scanning process, you can click "Filter" to quickly find wanted files.

find wanted sd card files

Step 3. Restore SD card data.

You can check and preview found files by double-clicking each one of them. Then click Recover to save found SD card files to a secure location on your PC or external storage.

recover sd card files

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Updated by Gemma

Gemma is member of EaseUS team and has been committed to creating valuable content in fields about file recovery, partition management, and data backup etc for many years. She loves to help users solve various types of computer related issues.

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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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