Unable to format SSD in Windows 10 Disk Management
SSD has become a popular storage device among computer users due to its great and stable performance. But sometimes, you may find that you have no option to format SSD
in Disk Management as the option of “Format…” greyed out in Windows
Disk Management if you need to format SSD out of certain reason like formatting external hard drive for PS4, formatting SSD for new install, and so on.

Effective ways to format SSD under 3 different situations
The option of “Format…” in Windows 10 Disk Management greyed out can
be a result of different elements and you can take corresponding ways to format SSD
based on specific situation.
Situation 1. The unrecognized SSD in Windows Disk Management
When the file system of your SSD is not recognized by Windows or there are bad
sector on your SSD, you can find “Format…” option grayed out. In
such case, you can try to format SSD using CMD or third party partition manger.
A. Format SSD using Diskpart utility
First of all, you should run Diskpart as administrator by pressing Windows + R at the
same time, inputting “diskpart” and hitting Enter key. Then, run the following
commands in order.
list disk
select disk n (the number of the SSD that you need to format)
clean
convert mbr (or “convert gpt” based on the disk capacity)
create partition primary
select part 1
active (if it is the boot drive)
format fs=ntfs quick (you can replace ntfs with fat32 or exfat)
exit

B. Format SSD using AOMEI
Partition Assistant
If you are unfamiliar with Command Lines or need to format
partition beyond 32GB to FAT32, you can turn to AOMEI Partition Assistant Standard, compatible
with Windows 10/8/7, XP and Vista, will become your nice choice. Let’s see how it
works:
1. Download this freeware, install and run it. In
the main interface, right click the partition on SSD and select “Format
Partition”.

2. In this small window, specify the file system of the SSD partition based on your
own demand and click “OK”.

3. Preview the operation. Then, click “Apply” and
“Proceed” to perform it.

Situation 2. Format SSD with OS installed
If you try to format the SSD partition that OS installed on, you’ll find the option
of “Format…” is not working in Disk Management as you are not allowed to format
partition containing OS within Windows. At this time, you can format your SSD that
OS installed from BIOS under the help of AOMEI Partition Assistant.
Things you should do before formatting
▸Backup important files on the SSD as formatting will erase all data on it.
▸Connect a USB drive to a working computer running Windows and create a bootable USB drive via AOMEI Partition Assistant.
▸After creating bootable media successfully via AOMEI Partition Assistant, enter BIOS
while rebooting to boot computer from the bootable USB drive.

Then, you’ll be in the main interface of AOMEI Partition Assistant. Do as the
following steps.
1. Right click the SSD partition that needs formatting and choose “Format”.
2. Choose file system of the partition on SSD.

3. Return to the main interface, click “Apply” >“Proceed” to execute the operation.
These are all steps on how to format SSD with OS on it.
Notes:
▸After formatting SSD that OS installed on, you will be unable to boot
computer from the SSD anymore. Therefore, be cautious to make this
operation.
▸Apart from formatting SSD partition, AOMEI Partition Assistant can also help
you to securely erase SSD and wipe hard drive.
Situation 3. Unknown, not initialized SSD in Windows Disk Management
If you try to format your SSD to make full use of it when it shows as disk unknown,
not initialized in Disk Management, you’ll find that “New simple Volume” is disabled
and you are unable to format SSD with certain file system. At this time, what you
need to do is to initialize the disk by following the steps below:
1. Locate the SSD that you need to initialize, right click it, and choose “Initialize
Disk” option among given results.

2. Follow the wizard to initialize the SSD as MBR or GPT disk.
PS.: Initializing will cause data loss on the SSD. If you fail to initialize the disk, you can refer Solved: Unable to Initialize a Hard Drive in Windows 10, 8, 7 for effective solutions.
After that, you are able to format SSD with the wanted file system in Disk
Management.
Conclusion
On this page, we not only explain why you find no option to format SSD or the “Format”… option is not working in Windows
Disk Management, but also share corresponding solutions. The recommended free partition manager can help you a lot. To experience more advanced features, like align SSD partitions, transfer OS between MBR and GPT disk, securely erase SSD drive and more, you can upgrade to Professional edition.