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