What Is The Recommended Disk Size for Windows Server 2019?

What is the recommended disk size for Windows Server 2019? If your Server 2019 doesn’t reach the ideal disk size how to fix it? Find the answer and methods in this post.


By Lucas / Updated on December 8, 2023

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What is the minimum and recommended disk size for Windows Server 2019?

On October 2, 2018, Microsoft released Windows Server 2019 on a global scale. Although Server 2022 has been released as its better successor, Server 2019 now still possesses many users, and many people want to install it to help them.

Windows Server 2019 space requirements are higher than the Windows PC system. If you plan to set a Windows Server 2019, the Windows Server 2019 recommended specs are:

4 processor cores (For 1 or 2 users, 2 processor cores)
16 GB for RAM (For 1 or 2 users, 8 GB RAM)
Disk volume for OS, RAID 1, 128GB (It holds additional roles and features installed based on server roles, Windows Updates, miscellaneous files, logs, etc.)
Disk volume for Data, RAID 1, 512GB

To ensure the Windows Server 2019 can run smoothly for 2-3 years, the recommended disk plans are:

For best performance--128GB SSD+ 512GB SSD
For best price consideration--256GB SSD+ 1TB HDD

If you think the plans we recommend are suitable for your circumstances, then you can try to extend the Windows Server 2019 OS partition size and fix the Windows server 2019 low disk space alert by adjusting your Server disk. Since SSD is always the best plan for OS disk, we suggest you don’t split more drives on your Server OS SSD, which can offer better performance in the future. As for the data disk, you can partition it to store different files and applications to do classification.

How to fix low disk space alert in Windows Server 2019

However, if you’re a Windows Server 2019 user who’s suffering low disk space alert or a crowded C drive on your Windows Server 2019, before you find a larger SSD to replace the current disk, what can you do to release the storage pressure on your disk?

Leave this problem to AOMEI Partition Assistant Server, and save your disk from low storage crisis! AOMEI Partition Assistant Server is a disk and partition manager specially designed for Windows Server devices. It perfectly supports Windows Server 2022/2019/2016/2012(R2)/2008(R2) and offers many helpful functions. For storage crisis, it gives users 3 features: “App Mover”, “Allocate free space”, and “Merge Partition”.

App Mover: This feature is for users who wish to move the installed programs to another drive or another disk with enough free space to release storage space. It avoids the work of reinstalling, so users can directly run the moved programs from the new location.

Allocate free space: Normally, users can add volume to increase the C drive space in Disk Management, but "Extend Volume greyed out” often impedes the way because there is no unallocated space. To avoid deleting the partition, this function can reallocate unused space of one drive to the target partition to make use full of disk space. And users can customize the size redistribution based on their situations.

Merge Partition: Merge any unallocated space into any available partition. No matter if it’s adjacent or not. And if you need, you can merge two partitions into one.

Now, here are all details about these three.

Free DownloadWindows Server 2022/2019/2016/2012
Secure Download

1. App Mover

Step 1. Download and install AOMEI Partition Assistant Server. After opening, you can see many useful functions on the main interface, click “Free up” on in the top toolbar, and choose “App Mover”.

App Mover

Step 2. Select the disk and drive where the apps you want to move are located and click “Next”. You can even click “Manage/Restore Apps” to restore the moved software to its original location.

Select partition

Step 3. In this window, please tick the programs you want to move, and then select the new path. Finally, click “Move”.

Tick App

Step 4. Read the prompts carefully, and then click “OK”.


Step 5. Wait for the transfer to complete, click “Finish”. Finally, don't forget to click “Apply” in the upper left corner to submit the operation.


2. Allocate Free Space

Step 1. Launch AOMEI Partition Assistant, right-click the partition from which you want to allocate free space, and select "Allocate Free Space".

Allocate free space

Step 2. Type in the size of the free space which you want to cut from this partition and this free space will be directly added to the destination partition.

Allocate from D drive to C

Step 3. Click "Apply" to execute this operation. In the pop-out window, you can see how much time it will cost you to finish this operation.


3. Merger Partition

Step1. Run the software, right-click partition C,  choose “Advanced” and select “Merge Partition”.

Merge partition

Step 2. Choose the partition that you wish to be merged, and click “OK”.

Merge unallocated space

Step 3. Click “Apply” and you can preview the result. Click “Proceed” to commit the operation.


Then, you need to reboot the computer to finish the operation. Then, you can also scan your PC to find and remove large files to release more space.

Bonus tips

The recommended disk size for Windows Server 2019 is just a suggestion. The specific situation needs to be adjusted according to the usage of your Server. For better performance and larger capacity, we advise you to change to a new larger SSD as the OS disk for your Server. You don’t need to worry about anything because AOMEI Partition Assistant Server offers “Migrate OS to SSD” and “Disk Clone Wizard” functions to help you do this job.

Lucas · Staff Editor
I prefer peaceful and quiet life during vacation,but sometimes I watch football match if my favorite club performs brilliantly in that season. And I love reading, painting and calligraphy, thus I send my friends festival handwriting cards every year.