By Emily / Last Updated October 16, 2019

User case: Micro SD card RAW problem

“My camera memory card is displayed as RAW file system (it is with FAT32 previously) and I cannot access it as normal. So, I just come here and ask what I can do to re-access these files. Do you have any idea? How can I format Micro SD card from RAW to FAT32? Please, help me! Thanks! What usually causes RAW SD card?”

Typical causes for the problem

It is a rather widespread problem Micro SD Card, HDD, SSD, USB flash drive, pen drive or other data storage device is not accessible, the type of the file system is RAW. So what usually causes the problem:

1. There are some bad sectors in the key area of the Micro SD card.

2. The file system of the SD card partition suffers structural damage.

3. The partition table of the Micro SD card gets corrupted.

4. Virus or malware attack.

5. The access permission to the partition, which is related to local security policy, is configured improperly. So the partition becomes RAW to restrain your further access.

How to format Micro SD card from RAW to FAT32 in Windows 10/8/7?

If the Micro SD card becomes RAW format, you would get the error message “The volume does not contain a recognized file system” or “The disk in drive X is not formatted, do you want to format it now” when attempting to access it. That will prevent you from accessing any data stored in the Micro SD card (as mentioned in the User case). Hence, in order to access the data as before, you can format RAW SD card back to FAT32. The following methods worth your trying.

Method 1. Format RAW to fat32 using Diskpart Command

When you cannot format RAW SD card to FAT32 in Disk Management or File Explorer and Windows prompts: “The format did not complete successfully” and “Windows was unable to complete the format”, Diskpart Command can help. Below is how to format RAW SD card to FAT32 in CMD.

First of all, open Command Prompt windows by clicking Search box, input “cmd”, right clicking the icon and selecting “Run as Administrator”. Then type in the following commands in sequence and press “Enter” after each.

  • Diskpart

  • list volume: all disk volumes on your computer will be shown.

  • select volume n: n represents the number of the RAW partition (here we select volume 6)

  • format fs=fat32: format RAW partition to FAT32

Finally, type “exit” to close the Command Prompt.

RAW To FAT32 Diskpart

Diskpart Command is a great alternative when you failed to format RAW to FAT32 in Disk Management and File Explorer, but all the three tools share a common limitation: cannot format over 32GB (RAW) drive to FAT32. That is to say, if the RAW Micro SD card is larger than 32GB, you cannot format it to FAT32 via Diskpart Command and will receive Virtual Disk Service Error: The volume size is too big.

Method 2. Format RAW to FAT32 via AOMEI Partition Assistant

In order to avoid the 32GB partition size limitation during formatting it to FAT32 in Windows, you can use AOMEI Partition Assistant Standard. It is a great free RAW to fat32 converter for Micro SD card. It breaks the limitation and could format large (RAW) SD card to FAT32 with ease. In addition, it is also able to format RAW hard drive to NTFS.

Now download the freeware and follow the steps below to format Micro SD card from RAW to FAT32 in Windows 10/8/7/XP/Vista.

Before you do: retrieve data from the RAW drive via a data recovery software since formatting process will destroy all data on the target partition.

Step 1. Install and run AOMEI Partition Assistant to enter its main interface. Right click the RAW partition (it probably shows as Unformatted here) and select “Format Partition”.

Format RAW SD Card

Step 2. Select “FAT32” in the file system menu, and click “OK”.

Format RAW SD Card To FAT32

Step 3. Click “Apply” to start the formatting process.



You can format Micro SD card from RAW to FAT32 via these two methods, when it becomes RAW. If your SD card comes with a large capacity over 32GB, AOMEI Partition Assistant is your best choice. If you want to experience more amazing functions such as recovering lost partitions, extending system partition to solve “low disk space” issue and so on, you can upgrade to Professional edition.