Can I Merge Two Unallocated Spaces Without Deleting Data, How to do?

I have two unallocated space that is non-adjacent on my hard drive. All I want to do is merge them into one and extend the existing partitions.

According to your information, you are required to merge the two unallocated spaces for partition extension. This is challenging as the Windows Disk Management tool can't extend the partition with non-adjacent unallocated space. However, EaseUS Partition Master can apply to this scenario perfectly with its clear interface and various features. The "Resize/Move" and "Allocated Space" functions can increase the size of the system and data partitions safely and quickly.

Situation 1. Unallocated Space Is Next to the Partition You Want to Extend

If you want to resize the partition that is contiguous with the unallocated space, follow the in-depth guide below to learn how:

Situation 2. Unallocated Space is Non-adjacent to the Target Partition

What if you want to extend the system C drive that far away from the two unallocated spaces? Take it easy. EaseUS Partition Master allows users to allocate space from other partitions. Thus, you can merge the unallocated space into the partitions next to them and use "Allocate Space" to move these free spaces to your C drive. Read this post and find out the detailed steps:

Further Information: How to Extend C Drive With Free Space