About the unallocated space before C drive
There are a few reasons behind unallocated partition before C drive. Generally,
Windows bootloader is on a separate partition labeled as system reserved
partition, which is at the left end of the hard drive, instead of system
partition in Windows 10/8/7. If you have moved the bootloader to C drive and delete
the system reserved partition, then you have unallocated space to the left of your
system drive. Some of the computers have a factory recovery partition also known as
OEM partition that may locate on the beginning of the hard drive. After upgrading to
Windows 10, the factory recovery partition will not work anymore. Therefore,
many users have deleted it, resulting in unallocated space ahead of C drive. No
matter what caused the unallocated space, there is a way to merge it to any of the
existing partitions on the same hard drive.
How to add unallocated space on hard drive to other partition?
Since the Windows built-in tool Disk Management all allows you to extend a partition
using the contiguous unallocated space to its right, you will need a partition
manager utility for this purpose. If you are new to this matter, free software AOMEI
Partition Assistant is the best choice. With its intuitive interface, you can easily
use it to add unallocated space to any partition on the hard drive without losing
data. However, you can never be more careful about data protection, so it is
recommended to backup important data before making any changes to your
partitions. You can follow the step by step guide below to manage the unallocated
disk partition on the left.
1. Download and run this disk partition software.
2. In its main interface, you can see all your hard drive partitions are shown
clearly. Then click the unallocated space and select “Merge Partition”.
3. In the pop out windows, tick the check box of the partition which you want to
merge the unallocated space into and click “OK” to continue.
4. Then it will show you the partition layout after the process. If no problems,
click “Apply” to apply this changes.
This operation will be complete in AOMEI Pre-OS mode after a restart. When the
Windows has loaded again, you can see the unallocated space before c drive is gone.
In addition to removing the unallocated space, you can also use Move Partition and
Resize Partition features, which will not cause data loss either. Also known as free command
line partition manager, AOMEI Partition Assistant enables you to manage
partitions and disks from the command prompt.