[toni-a]

I need a software that would find duplicate pictures  on my backup drive 
the ones I am finding need exact duplicates=same file name.
while plenty of duplicates are copies of the same photo but with a different file name.
for instance a photo on the memory card is called img-0001.jpg, I download it today and rename it, then download it another time while renaming it something else or even keep same original name.... 
Any recommendations ?

[Klaus]

A quick google search gave me this ... https://www.auslogics.com/en/software/duplicate-file-finder/

No personal experience with it.

[toni-a]

A quick google search gave me this ... https://www.auslogics.com/en/software/duplicate-file-finder/

No personal experience with it.

Didn't last more than 10 minutes, uninstalled

[giulio]

I use dupeguru ( https://dupeguru.voltaicideas.net/ ) , but i haven't understood exactly what you want to do.

Some others:

fclones (commandline): https://github.com/pkolaczk/fclones

czkawka : https://qarmin.github.io/czkawka/

[wim]

Have you tried Norton Commander yet?
I have used it in the past for similar operations, just that I have no idea if the current version works the same as the older, DOS-shell based one.

It has, or used to have, a bit of a learning curve, but it worked very well indeed. There is a free version, and a paid for verson (30 euros). Here is a link: https://www.winnc.com/

HTH, kind regards, Wim