Scenario
Below are two scenarios related to disk management combine partitions we may
meet in our life:
Scenario 1: Some users' C: drive is running out of space.
Thus, they try to clone the recovery partition to an external hard disk, then delete
the recovery partition and merge the unallocated space with C drive.
Scenario 2: Other users want to make use of the unallocated
space on the disk. However, when trying to use Disk Management to merge unallocated
space in Windows 7, they cannot merge partitions with it on the disk.
In reality, all above scenarios come down to the same question: improper disk space
distribution. Some partitions are too large while other partitions are too small.
Even, there is an unallocated space which you cannot make use of owing to hard drive
limit. In this way, you would better repartition it again.
What Is the Disk Management?
Disk management is a Windows built-in tool, which can help us solve a lot of problems
like low disk space . In disk management, you
can create partitions, delete partitions and indirectly merge partitions etc in
Windows 10/8/7. It's a simple and easy-to-use tool. And, We do not need to
store it using extra space.
Disk Management combine partitions in Windows 7/8/10
Step 1: Right click Computer or This PC , select manage to enter the main page of Computer Management.
Step 2: Click Disk Management and select
the disk you want to delete after you see all the partitions on your disk, then
choose Delete Volume from the context menu.

Step 3: Right click the partition you want to merge and select Extend Volume. And wait for the final result.

Step 4: After selecting Extend Volume, you will enter into a new
window. In this window, you will see all the available disk. Now, double click it (
or you can manually click Add to select the available disk at
the left box) and tick Next.

Step 5: After finishing all above steps, you can see following
window. In this window, you can see the E: partition becomes 5.7 GB.

Now, you can successfully merge hard drive partitions with Disk Management. However,
there is a main limitation you cannot ignore: data loss.
In Disk Management, you are only allowed to merge hard drive partition with
unallocated space. Thus, if there is no unallocated space on your disk, the only way
is to delet the partition next to your target partition. To ensure the security of
your data on the disk, you need to back up your it or directly copy
partition to another one before you delete partition.
Aside from data loss, there's another limitation in Disk Management. It requires
that the unallocated space must be right adjacent to the target partition. If not,
you still cannot merge partitions in Windows 7/8/10.
To fix these problems, I reccommend you the best free partition extender AOMEI
Partition Assistant.
How to merge two partitions in Windows 7/8/10 with partition extender?
Best Free partition extender: AOMEI Partition Assistant
AOMEI Partition Assistant works as a partition extender, which is aimed to help
Windows users to repartition hard drive without data loss. With it, you can merge
partitions in Windows 7/8/10 effortlessly. If there is unallocated space, you can resize partition first. If the unallocated space is not right adjacent to the target partition, you
can move partition first. If
you want an easier way, you can Merge Partition.
Detaied steps to merge two partitions:
Step 1: Download AOMEI Partition Assistant, install and enjoy it. In the main page, click the partition you want
to merge and select Merge Partition.

Step 2: Select the adjacent partition or any unallocated space
on the disk, then click OK.

Step 3: Click Apply to ensure you want to
merge with the selected partition.

Step 4: Click Proceed to continue the
operation and wait. After all the operation finishes, you will receive a message
like “Congratulation! All operations have been completed
successfully ” and click OK.
From above, you can clearly see that there is no unallocated space next to E
partition. But, you still can successfully merge hard drive partitions without data
loss. Thus, I think AOMEI Partition Assistant is a great choice for users who want
to repartition the hard drive owing to low disk space warning.
With it, you can repartition any partition including System Partition, Data
Partition or other partition. To repartition hard drive, you can choose to merge two
adjacent partitions simultaneously with target partition. Also, you can choose to
merge any unallocated space on the disk.
Summary
Disk management combine partitions can solve the improper disk space
distribution to some extent, but the cost is data loss. Once there is no unallocated
space, the only way is to delete partition. At the same time, you are likely to
delete your important data mistakenly during the process. But if you use AOMEI Parition Assistant, you can avoid data loss. And you can
finish the entire process effortlessly with a few clicks.
In short, AOMEI Partition is a better choice. Download it and try for yourself.