It is necessary to format SD card
SD card is widely used to store or transfer data due to its light weight, cheap price and great performance. In general, you’ll need to format (micro) SD card under the situations listed below:
Your SD card is unallocated and you should to format it so that you can save data on it.
The file system of your SD card is not compatible with your device and you need to format it to proper file system.
There is something wrong with SD card. For example, SD card not showing capacity correctly; there is messaging saying that SD card is damaged. Try reformatting it.
Format a SD card using Diskpart
In many cases, you can format SD card successfully to wanted file system within File Explorer or Disk Management. If you encounter an error like Windows was unable to complete the format whiling formatting within File Explorer. At this point, you can try to format SD card using Diskpart utility, which can help you to manage disks and partitions. You can try to use it to format SD card even when the SD card shows Raw. Have a look at how to format Raw SD card using Diskpart.
PS.: Formatting SD card partition will erase everything on it. You can backup wanted files before this operation.
1. Run Diskpart as administrator.
(In the Search box, type “diskpart” and right click diskpart and choose “Run as administrator”.
Or press Windows + R at the same time, input “diskpart” and click “OK”.
2. Input “list disk” and hit “Enter” to display all disks on your machine.
3. Run “select disk n” command, “n’ refers to the disk number of the SD card
4. Run “list partition” command to list the partition on SD card
5. Select partition m, “m” refers the SD card partition number that you need to
6. Run “format fs=fat32 quick” command.
PS.: fat32 can be replaced with exfat or ntfs. You should choose file system according to your demand. For example, you can format SD card to exFAT, if you need to use it for Mac and Windows PC and need to store individual large file beyond 4GB.
After a while, the SD card will be formatted with Diskpart, you can type exit and hit “Enter” to leave Diskpart.
If the SD card is with one more partitions or have unallocated space, run command presented below:
select disk n
create partition primary
format fs=ntfs quick
assign drive letter f, “f” can be replaced if you want
Format a SD card via Diskpart alternative
If the SD card partition is over 32GB, you are not allowed to format it to FAT32 using Diskpart and you'll receive the error – The volume size is too big. If there are two partitions on SD card and you’ll be unable to format the second partition on SD Card using Diskpart. Therefore, to break limitations aforementioned, you can turn to thrid party partition manager like AOMEI Partition Assistant, which can breaks the limitation of 32GB and manage the second partition on SD card. What’s more, it is offered with many other powerful functions like wipe hard drive, copy HDD to HDD/SSD and so on. But for OS migration from MBR disk to GPT or GPT to MRB/GPT via AOMEI Partition Assistant, you need to upgrade it to Professional edition.
Here are detailed steps to format SD card using AOMEI Partition Assistant. (Take formatting SD card on Windows 10 as an example)
Step 1. Free download, install and run AOMEI Partition Assistant. Right click SD card partition need formatting and choose “Format Partition”.
Step 2. In the following pop-up window, determine the file system of your SD card partition based on specific demand. Here you can choose from NTFS, FAT32, exFAT, Ext2, Ext3 and Ext4.
Step 3. In the main interface, confirm operation and click “Apply”>“Proceed” to perform it.
Apart from SD card, AOMEI Partition Assistant can help you to format external hard drive, USB flash drive or pen drive.
AOMEI Partition Assistant is specially designed for Windows systems and it is able to work with Windows 10/8/7, XP and Vista.
From all above, we can realize that it is not a difficult task to format SD card using Diskpart utility or AOMEI Partition Assistant. You can choose one way to format it according to your specific demand.