Can I find & delete local duplicate files compared to a network drive?

I have a bunch of picture files on a network drive that I want to treat as 'master'. And I have bucket load of pictures file spread across various disks on my local PC. For sure, a bunch of the local files are already saved into my 'server'.
I'd like to use the MD5 hash compare for duplicate files, to compare my local PC to the network folder, but I cannot figure out how.

I put in the \servername\share as the first folder. Then when I try to add say, C drive, as a second folder, the network folder is removed.

If I run the duplicate files across all local drives, I figure I will find and delete the duplicates, but will potentially still end up with one duplicate of what is on the server; I'd like to eliminate the pain staking effort of manually verifying by timestamp or similar.

Can I achieve what I would like? If so...how?

Turn off Lock Folder (Alt+K) and you can add as many folders as you wish.

I must be doing something incorrect then. I do not have the lock folder enabled (I just tried it and it goes to whatever folder is in the active window), but I cannot add more than one folder either.

I click the green tick to add my folder (say the server) and it appears. Underneath it says 'add folder to search...' slightly grey. With that highlighted, I click the green tick to 'select folders to search' and then choose something else. clicking ok replaces the original entry instead of adding to it.

it goes to whatever folder is in the active window

Yes, that is the meaning of Lock Folder. Simply turn it off.

Double-click the Add folder to search line (or click it once, and then click the ... button that appears).

Thanks @Jon, that was it. Double-clicking never occurred to me :frowning: to add a new line