Windows 10: How do I switch back my C drive to my main drive?

Hi I've been having trouble with my computer's C and D drive. So on my C drive I have 446 gbs and my D drive I have 931 gbs. A while ago my storage was getting full with games and photos so I looked up on youtube to try to find a way where I could change my D drive to my main drive because it had more gbs. I ended up watching this video and putting some type of command that I cant remember but then afterwards when I would download a picture or an appit would put it on my desktop but my C drive would continue to get full. Im trying to figure out if there is some type of way I can restore it t

:)

 

GPT disk conversion for both data drives and C drive


Macrium Rescue disk can be used to convert from MBR to GPT and vice versa without doing a fresh install of Windows.

1. Download Rescue6.1.1081X64.iso - Google Drive and use Rufus to create a bootable USB disk. Skip this step if you've already created the Macrium Rescue disk.
2. Download: BootEFI_Only-00-00.zip - Google Drive . Unzip to an external or an internal HD
   NOTE: This is a copy of the first 3 partitions of my current Windows 10 x64 (450MB Recovery, 100MB EFI and 16MB MSR)
3. Boot up Macrium Rescue disk and create a backup of your current Windows to another internal/external HD. It serves 2 purposes: you'd have a backup of your current Windows in case things go wrong and then use it to restore the C drive on the next steps.
4. Next, switch the BIOS to UEFI and use Macrium to restore the first 3 partitions downloaded in step 2 to your current MBR Windows. No need to convert or Format, Macrium will do it.
5. Again with Macrium, select the backup image from step 3, and copy back the C drive after the 3 partitions.
   After this step, you should have: 450MB, 100MB, 16MB and C drive (GPT partition scheme)
6. From Macrium, click on Fix the Windows Boot Problems
7. Reboot. Your Windows should be in UEFI mode.

 

Unallocated Space to C Drive

Thanks

 

C drive inaccessible

Hi Paritosh,

Thank you for giving us an opportunity to assist you with the query.

Apologize for the difficulties that you're experiencing in Windows 10.

Please be assured that we will do our best to help you.

• 
  Have you logged in as an administrator?
  
• 
  Have you made any changes to the computer prior to this issue?
  

An "Access Denied" error message can occur for one or more of the following reasons:

• The folder ownership has changed.
• You do not have the appropriate permissions.
• The file is encrypted.

Before we could reset the computer, let us try the following steps, and check if it helps.

Step 1: I suggest you to follow these steps to take the ownership of the drive.

• 
  Right click on Drive C and click
  Properties.
  
• 
  Switch to Security tab, click Edit and
  Add to add your user account, if it is not listed. Assign the
  full control permission for your own account and click OK.
  
• 
  Click Advanced, switch to Ownership tab and click
  Edit button.
  
• 
  Highlight your user account and click
  Apply, and then click OK.
  

Step 2: Let us try to disable to UAC settings and check.

• 
  Press Windows key + S and type
  User account control.
  
• 
  Select Change User Account Control Settings.
  
• 
  Move the slider to Never notify and click
  Ok.
  

Refer: "Access Denied" or other errors when you access or work with files and folders in Windows

"Access Denied" or other errors when you access or work with files and folders in Windows

(Applies to Windows 10 as well).

Hope it helps.

Let us know the status, we are glad to assist you further.