Windows 10: How to merge 2 Drives that are on the same SSD?

I recently bought a new SSD M.2 NVMe which has 1 TB of storage. My old SSD had a storage of 250 GB SATA. My main goal was to make this new SSD my main C drive in order for BIOS to boot from the new SSD. Once I installed it, I cloned the old SSD to the new one and was able to change the boot priorities in BIOS to launch using the new SSD. I then noticed that the new SSD was split into 2 separate drives in my file center. One drive has the same storage as my old SSD with all the OS files. While the other drive has the remaining space of the new SSD 698 GB free, both on the same SSD of 1 TB. I

:)

 

OS drive merge with external drive

Your use of the word "merge" has possibly confused other responders.

What is on the drive that does NOT have Windows 10 already installed and working?

If the files on the second drive are ONLY data, you can move or clone the Windows 10 drive to the new 2 TB drive and then simply copy the data files to the new 2 TB drive.

How to clone or move Windows 10 to a larger hard drive:

• How to Clone or Move Your Windows 10 Installation to a Larger Hard Disk or SSD
  
• How to Migrate Windows 10 to a New Hard Drive
  

 

Not Getting Able to Merge Drive with Unallocated Space!

i tried to Delete Part K which is now Unallocated Drive, i right clicked on Part I, selected option "Merge" now Drive is not being shown on list, not able to merge.

 

Cloning to SSD then swapping drive letters


@SamHobbs
What you want done is very simple and can be done in short period of time. Here's my suggestion:
There's 2 modes that Windows can be installed: UEFI and the old legacy MBR. Open Disk Management, look at the disk where your C drive is, if there's a

1. EFI System Partition, your Windows was installed using UEFI.
2. System Reserved partition, your Windows was installed using MBR

Next, Connect your SSD to an available Sata port (no need to format or do anything). Download: Macrium Reflect Free . Install and run. Follow the steps below:

1. From Macrium, click on image this disk under your C drive and save it to either an Internal or External Drive. This will create a single backup image of the whole disk containing your C drive.
2. Again, from Macrium, click on Restore tab and select the image created from step 1, Select your SSD as the destination drive, click Next->Finish
3. Exit Macrium. If your Windows was installed using MBR, Open disk management and make sure the SSD is marked "Active" else go to next step.
4. Shutdown your PC. Disconnect the HD containing Windows C drive then connect your SSD to it.
5. Reboot. Your PC should boot and the Windows should have C as the drive letter.

NOTE: The procedure above is to backup your Windows to an image file then copy it back to the SSD. This ensures proper cluster size aligment for the SSD. In addition, Macrium also perform Trimming for the SSD. This is more preferable than cloning.