You can either run it from your desktop (over SMB), which provides a user-friendly GUI and supports comparing image files visually.
Or you can install it as an “app” (or in a “sandbox”), with the caveat that it will be a command-line tool, which is harder to compare and go through long lists in the results.[1]
EDIT: For the record, I use the GUI version of Czkawka from my Linux desktop over SMB shares. Believe me when I say you’ll feel much better with some manual intervention to look through the list, and even open up some files. (Double-clicking a result in the list will open the file. Double-clicking with the right mouse button will open its directory.)
The GUI also has the benefit of image previews (on the right side panel), without having to open any files.
I would not feel comfortable to automatically remove duplicates without actually going through the results myself. ↩︎