I have windows 8.1 pro N.my operating system in my local disk c drive and it is currently full. how do I transfer my operating system from local disk c to local disk d. I have a recovery drive also.

Instead you may reduce C drive capacity by using Disk Cleanup. You may also transfer files to D partition which will help to regain space in C drive.  

I have disk clean up also. I reduced nearly 1 gb. but how do I transfer files and what type of files should I transfer. I cannot transfer the windows files

Hi

We dont suggest move your system to different drive, it might cause boot issues or corruption which is not fixable.

Besides Disk cleanup, Additional ways to conserve space on the system volume include the following:

Move the paging file to another volume on the system.

Disable hibernation on the system.

Use the dedicated dump file option to capture memory dump files on another volume on the system.

Offload user profile and program file directories to another volume on the system.

Disable system restore points on client installations.

Clean out all temporary directories and folders by using the Disk Cleanup Wizard (cleanmgr.exe).

Uninstall unused applications or utilities from the installation.

How to clean up the WinSxS folder

https://technet.microsoft.com/en-us/library/dn251565.aspx

Tips to free up drive space on your PC

http://windows.microsoft.com/en-us/windows-8/free-up-disk-space

If you still think you need larger space for system, I suggest you extend you C drive instead of moving system to another drive.

There are third party software for that but it is not recommended.

Backup all the data from your D drive to a different disk/partition or external hard disk, delete the volume of D and extend some spaces to C, make sure still have enough space for backup file then re-create it. Then move your data back on the new D drive.

https://technet.microsoft.com/en-us/library/cc771473.aspx?f=255&MSPPError=-2147217396

Regards

D. Wu

how do I extend my c drive. is there ant way to do this

Hi,

You could do this by using device manager without other software. However you might need delete/recreate the partition next to C drive (typically is D drive). Make sure there is no system file or boot file (only data file) in that partition. Backup all the data from your D drive to a different disk/partition or external hard disk, delete the volume of D and extend some spaces to C, make sure still have enough space for the file you just backuped then re-create it. Then move your data back to the new D drive.

How to Extend a Basic Volume (also applies to Windows 8.1)

https://technet.microsoft.com/en-us/library/cc771473.aspx?f=255&MSPPError=-2147217396

Regards,

D. Wu