I'm not sure what exactly you mean by "c" vs "d", "internal"...
It also highly depends on the imaging/backup software you use.
Hi Meerkt my operating system is installed on a SSD drive letter "(C:)" my second internal HD is called "Storage Disk (D:)" with the assigned letter (D:) attached. I'm using the windows 10 in built system image backup tool. When ever I do a full drive image recovery and windows looks for the " WindowsImageBackup" folder it finds "Storage Disk (C:)" which I don't have and I can't change it to point to "Storage Disk (D:)" after the update. Since doing a full clean windows install it's still doing it so I'm thinking the update has screwed this up because it continues doing it.