EaseUS Partition Master

Easily manage your disk partitions with this trusted software.

  • Convert MBR to GPT for Windows 11.
  • Migrate Windows 11 to New SSD in 1-Click.
  • Extend C Across Disks, Fix Low Disk Space Error.
Free Download 

Windows 11/10/8/7100% Secure

Content

Total downloads

Page content

What Is The Best Way to Change SSD Cluster Size? Your Guide Is Here

Updated by Roxanne on Dec 02, 2021
Written by Tracy King
mins read

Changing the cluster size of a disk is commonly known as switching the disk allocation unit size, which is a breeze. Our digital tools are ideal for business owners and home users who want to adjust the size of their clusters. So, what is cluster size? What are the numerous disc formats, and how does our software make cluster size modification stress-free and easy?

What is Cluster Size?

Cluster

You must select a cluster size when formatting a solid-state drive (SSD), hard disc drive (HDD), SD card, thumb drive, or any other storage device. The "Allocation Unit Size" feature allows you to change the size of a storage device's cluster. How your file systems structure your storage device is determined by the cluster size. The least amount of storage space that a single file can utilize during its generation and storage is determined by the cluster size.

The cluster size you select determines how much RAM is available to store and hold one file. The file is subsequently split up and saved on the storage device in many portions. Files that do not fit inside an even multiple of your chosen cluster size take up extra storage space, which is calculated by rounding up to the next even multiple.

A Cluster Size Examples on SSD

If you save a 512-byte file on a partition with a 512-byte cluster size, the file will take up 512 bytes of storage space. Good so far?

When a 525-byte file is stored on a storage device with a 512-byte cluster size, the file takes up 1024 bytes of storage space. Because the partition is assigning the next multiple (1024) of its 512-byte cluster size to hold your file, it takes up more than 525 bytes of storage space.

However, for now, the cluster size of a disk is more than 512, it has more units as shown here:

Image of disk cluster size

How to Change SSD Cluster Size?

For Windows, various file system formats determine how your data are organized. NTFS, FAT32, and exFAT are the three file systems available in Windows. And each file system file requires different cluster sizes. So the best way to change an SSD disk cluster size is to change its file system. 

Cluster Size of Different Partition Formats

Let's check the cluster size of different partition formats first:

Partition Format Cluster Size
NTFS
  • Default allocation size
  • 512 bytes
  • 1024 bytes
  • 2048 bytes
  • 4096 bytes
  • 16 kilobytes
  • 32 kilobytes
  • 64 kilobytes
  • 128 kilobytes
  • 256 kilobytes
  • 512 kilobytes
  • 1024 kilobytes
  • 2048 kilobytes
FAT32
  • Default allocation size
  • 1024 bytes
  • 2048 bytes
  • 4096 bytes
  • 16 kilobytes
  • 32 kilobytes
exFAT
  • Default allocation size
  • 2048 bytes
  • 4096 bytes
  • 16 kilobytes
  • 32 kilobytes
  • 64 kilobytes
  • 128 kilobytes
  • 256 kilobytes
  • 512 kilobytes
  • 1024 kilobytes
  • 2048 kilobytes
  • 4096 kilobytes
  • 8192 kilobytes
  • 16384 kilobytes
  • 32768 kilobytes

Note that Windows only supports FAT32 and NTFS file system formats. Therefore, if it's an internal SSD disk, you can only select NTFS or FAT32 as its format to switch its cluster. So how to change the cluster size of your SSD? Check the next part, you'll get two solutions that help to switch disk cluster size.

Recommended Cluster Size of SSD: Note that the larger unite size can lead to more writes over time, causing more wear and tear on SSD, which is not good for its lifespan. SO the recommended cluster size for SSD should be the default: 4K. 

Method 1. Let EaseUS Partition Master Help

At EaseUS, we create technologies that make changing the partition size, cluster size, and recovery procedure on your storage device simple, upfront, and stress-free by using our partition manager software - EaseUS Partition Master. We give lightning-fast support and coaching. We even offer a free version for help. 

You may now download this software and follow the following guidelines to optimize the SSD cluster size to 4K on your own. 

Free Download 

Windows 11/10/8/7100% Secure

Step 1. Select the SSD disk that you want to align, right-click it and choose "4K Alignment".

Step 2. Go to find task by clicking the "Execute 1 Operation" button at the top-left corner and click "Apply".  Then, the SSD drive partitions are all 4K aligned with all sectors on it.

Method 2. Run Disk Management to Change Cluster Size

The other method that you can try is to run Windows Disk Management and run the format operation so as to switch the cluster size for your SSD. Also, don't format to backup data in advance.

Here are the steps:

Step 1. Right-click Windows icon and click "Search", type create and format hard disk partition, and click to open Disk Management.

Open Disk Management

Step 2. On Disk Management, right-click on the partition in SSD disk and select "Format Volume".

Step 3. Set a new format for the SSD volume (be it FAT32 or NTFS), and then set the cluster size as 4K, click "OK".

Format partition and set cluster size

Wait for the process to complete.

Notes: When you complete the formatting, changing the cluster size of SSD, you can now restore the backup of files back to the SSD disk.

Changing SSD Cluster Size, Which Is Better? 4K Alignment or Formatting?

Note that on this page, we provided two ways that help you to adjust the SSD cluster size by using EaseUS Partition Master or applying disk management formatting.

 But which one is better? For a no-data-loss solution, we suggest you pick EaseUS Partition Master for help. Its 4K alignment feature makes the process of adjusting SSD cluster size easy and funny. You just need to click the command button, the rest jobs will all be done by this tool. 

Free Download 

Windows 11/10/8/7100% Secure

How Can We Help You

About the Author

Updated by Roxanne

Roxanne is one of the main contributors to EaseUS and has created multiple posts on digital devices like PCs, Mobile phones, tablets, Mac, etc. She loves to share ideas with people of the same interest.

Read full bio

Written by Tracy King

Tracy joined in EaseUS in 2013 and has been working with EaseUS content team for over 7 years. Being enthusiastic in computing and technology, she writes tech how-to articles and share technical solutions about Windows & Mac data recovery, file/system backup and recovery, partition management and iOS/Android data recovery.

Read full bio

Product Reviews

Product Reviews

TrustScore 4.7 | 49 reviews
  • I love that the changes you make with EaseUS Partition Master Free aren't immediately applied to the disks. It makes it way easier to play out what will happen after you've made all the changes. I also think the overall look and feel of EaseUS Partition Master Free makes whatever you're doing with your computer's partitions easy.

    Read More
  • Partition Master Free can Resize, Move, Merge, Migrate, and Copy disks or partitions; convert to local, change label, defragment, check and explore partition; and much more. A premium upgrade adds free tech support and the ability to resize dynamic volumes.

    Read More
  • It won't hot image your drives or align them, but since it's coupled with a partition manager, it allows you do perform many tasks at once, instead of just cloning drives. You can move partitions around, resize them, defragment, and more, along with the other tools you'd expect from a cloning tool.

    Read More

Get EaseUS Partition Master

Your best companion for disk partitioning, MBR to GPT/GPT to MBR conversion,even OS migration

Free Download 

Windows 11/10/8/7100% Secure