If you are only backing up your stills images then the DCIM and its subfolders are key. If you are recording video clips also.. then my recommendation is to backup the entire card
...... or .........pay attention to the following.
I have just written a utility to Ingest images from cards to disk. For now, I only shoot with Sony and have built it to suit my specific Sony workflow. There may be specific Fuji quirks which I would not be aware of.
In the past I only backed up the DCIM folders/subfolders.. because I do not shoot video. I was always worried at some stage I would shoot a video clip and then leave it behind.
So now.....
Here is my basic concept.
1. Everything that is in the DCIM folder or any sub folders gets backed up to my Target folder (see *** note below).
2. Everything else (I mean everything else) gets backed up (and relative subfolders maintained ) to a sub folder of my Target folder, titled 'SonyVideo Stuff'. (If I can think of a better folder name in future I will.. but I give it this name because
there is a lot of stuff in this folder and its subfolders.
Here is the reason why.
The following screen grab is a summary of a card I used to recently test video features of an FX3. On this card I shot
one sample stills image and
a number of video clips.
No.1 is the DCIM folder and subfolder/s containing the single raw stills file.
No.2 is a CLIP subfolder which contains the video clips and their related Xml files
No.3 THMBNL subfolder contains the jpg icon for the video clips captured.
No.4. Is various data files that I do not fully understand.
This example may not be complete as I have only test captured bog standard video clips and have not played with Luts, video compression codecs, etc.
Be careful.
The Dcim stills folder may contain multiple sub dcim folders ... which may in turn contain different images with the same filename. If you do not preserve the dcim sub folder structure you risk overwriting original images with a different image (but same file name).
The reason I capture all non DCIM folders is
that modern video editing software recognises and can make use of all of the video clips, related xml files and other related data files. My knowledge of video editing is nil... so I want to make sure any cards I copy to disk have all necessary files.
*** My Ingest app caters for complex scenarios, including copying cards with multiple sub dcim folders, copying the same card more than once into the target folder and copying multiple cards (from possible multiple cameras)into the same target folder. This was not a trivial task.