Re: Lightroom 5 help to restore a catalog
First- DO NOT TRY IMPORTING! Always the wrong way to correct this problem!
Your first screen-clip suggests that Lr is looking for the files on the Seagate Backup Drive-D:

Then your second screen-clip shows that you have a folder heirarchy deep within the Previews folders of the cache {...Previews.lrdata}- which is very weird and should not be so! You should not store original files in with the Previews cache.!

And it would appear these folders have intermingled photos- original files with files that may have been 'recovered' for some reason. judging by the cryptic file names.

I can only suggest that the photos on a Hard-drive must match the Folder heirarchy structure you see in the Lightroom panel (ie. on the D:Drive).
Then another question is- Why would you be referencing photos on a "backup drive"?
Do some research from these links-
MISSING FILES & FOLDERS (Lightroom Queen)
MISSING FILES AND FOLDERS-(Computer Darkroom)

