Why need to delete partition?
Sometimes, you want to remove/delete partition on SD card in Windows 7, Windows 10,
Windows 8.1/8, Vista and XP because there are too many partitions which mess up
everything. Or sometimes, you delete partition just because you want to release more
space or create a new partition for a better data management. Sometimes, the SD card
isn’t working quite right, deleting the partition is one of the possible
solutions.
How to delete partition on SD card?
Generally speaking, there are three common methods to delete partition, namely
using Disk Management, Diskpart and AOMEI Partition Assistant.
Method 1: Using disk management
Step 1: Press Win + R and type “diskmgmt.msc” at the Run box and open disk
management.
Step 2: Right click the partition that you want to delete and then click Delete
Volume. This operation will delete the partition you choose.

However, sometimes, when you tried to delete partition on SD card but failed, only to
find delete volume option grayed out in Windows Disk Management tool. This is
because the built-in utility will not provide delete partition option for extra
partitions on SD card or USB drives if more than one partition is detected. In case,
you have to find another solution.

Method 2: Using diskpart
To delete partitions on SD card or USB drive in Windows 7/8/10 with this program,
take the following steps:
1. Click Start and then type “diskpart” in search box.
2. At the diskpart prompt, type list disk
3. Type select disk n ( n means the disk where you plan to delete the partition)
4. Type list partition
5.Input select partition n
6.Type delete partition
Then the partition will be deleted.

Method 3: Using AOMEI Partition Assistant Standard
AOMEI Partition Assistant Standard is
a FREE disk partition management software with so many powerful features that you
can completely control your hard disk and partition. For example, you can flexibly
manage disk space with "Resize
Partition", "Merge Partitions", "Spilt Partition"
and "Copy Partition". It is quite
easy and fast to delete partition with AOMEI partition Assistant Standard, just
follow several steps and you’ll make it.
Step 1: download AOMEI Partition Assistant Standard and launch the software.

Step 2: Select the partition you want to delete and right click the mouse to choose
"Delete partition".

Step 3: After click "Delete partition", there will be two options you will
choose based on your own needs, choose the the option and click “ok”.

Step 4: Click Apply to execute the operation.

Tips: The Pro edition supports you to delete/format SD card with command prompt, you
can upgrade to Pro edition if
needed. It has many advanced features compared with the Standard edition.
After deleting the partition , you can enjoy a more free space to use, or you can create a new partition for better
data management. Sometimes, you may delete partition by mistake, you can
also recover partition with
AOMEI partition Assistant Standard.
Summary
In order to have a better data management, remove/delete partition on sd card is very
necessary. All you have to know is after you delete a partition, all the files and
data on that partition will also be deleted. So, ransfer or backup those useful
data which you don’t want to delete from the partition you are going to
delete.