modification historical on a pictures

[Frédéric Da Vitoria]

This has happened to me too, for example if I change a tag (for example 
changing an upper case to lower case, or editing an accent...). This tag 
modification is of course propagated to all concerned pictures. I found 
this annoying at first, because previous did not change the date in this 
case, but I understand that the files are indeed modified. And for 
backup purposes, the backup files indeed need to be refreshed IMO.

But maybe this is not the correct explanation in your situation?

-- 
Frédéric Da Vitoria


On 07/11/2025 10:34, frederic chaume wrote:
> Hi all
> Regurlaly , I'm running a backup of my digikam (Raw and Jpeg, DB files 
> , appData...) on my NAS
>
> So I do it today, but I see that more than 2K jpg seems have been 
> modified since last backup, seems all the same day (30th of October), 
> and I'm unable to see what has been changed.
> What I'm sure is there is no reason that I may have made any change on 
> them (no edit, no tags modification,...) all are old pictures.
> DK shows me that files have been modified at that date and when I 
> compare the previously saved file and the current one I just see a 
> small difference on the size.
>
> I'm running DK8.8 (installed few days before the 30th of October) on 
> Win11 (upgraded from Win 10 on 26th of October) and last backup has 
> been run before Win11 upgrade (so on 26th of October)
>
> So I have suspended the backup of those files until I can understand 
> the reason of the changes.
>
> My questions is then,  how can I compare files ? Is there a way to see 
> the historical of modification ?
> I selected several files and notice some inconsistencies :
> - some have tags on DK but none visible from the The properties/detail 
> of the file provided by the windows file manager, neither on the DK 
> folder or backup
> - some have tags on DK and also visible from the The properties/detail 
> of the file provided by the windows file manager on the DK folder but 
> none on the backup
>
> So I'm a little lost
>
> Thanks for your help
>
> Regards
> Frederic
>
>