If c: and d: drives are separate physical drives then you may simply need to look at mounting the drive in order to access it's contents.
Open a Terminal window:
sudo fdisk --list
This will display results such as:
Disk /dev/sda: 465.8 GiB, 500107862016 bytes, 976773168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x000d50ad
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 960522239 960520192 458G 83 Linux
/dev/sda2 960524286 976771071 16246786 7.8G 5 Extended
/dev/sda5 960524288 976771071 16246784 7.8G 82 Linux swap / Solaris
Each different physical drive will show as /dev/sda, /dev/sdb, and so forth.
Note the differences: /sda, /sdb - these represent your physical drives.
so if the d: drive is /dev/sdb. Create a directory to mount the drive, example below:
So if your d: drive is ntfs, the following may apply:
sudo apt-get install -y ntfs-3g
sudo mkdir /myddrive
sudo mount -t ntfs-3g /dev/sdb /myddrive
If you want to have it available when the system starts up:
https://solidfoundationwebdev.com/blog/posts/mount-ntfs-partition-or-drive-at-startup-with-user-as-owner-in-ubuntu-linux
sudo parted -l
in a terminal, and post the output. – wjandrea Mar 03 '17 at 04:13