Pictures - External Hard Drive Storage & Duplicates

Hi,

I have enough pictures to easily exceed my MBP internal hard drive capacity.

Is it possible to use one external hard drive and partition it so I can have the time machine backup go to one partition and store the pictures on the other partition?

I am also seeking feedback on what you recommend to delete duplicate pictures (apps, software) particularly given they will have to stored on an external hard drive. I have 10k-20k pictures so anything to make the process easier to clean up the folders and files would be awesome...

Your feedback is greatly appreciated!