I imported to an Internal HD through LR import function.
The originals were never moved.
They stayed on the HD they were imported to.
With all due respect, this does not answer the question I asked, specifically, did you do the following: "after you edited the photos and exported a copy, you removed the photos from LR and re-imported them at a later time"?
No, it is a backup of your catalog, a database called *.lrcta.
If you have added to it, you can search for the new images, select all of them and export them as partial catalog ( menu file-export as catalog).
This should reflect the delta to your *real* working catalog.
Then close this backup catalog. (As a catalog is a database, you can have only 1 open at a time.)
Open your working catalog. This one will miss this delta. So you invoke the command File-Import from Another Catalog, point to your exported delta catalog, and merge them thusly.
You could do this with your total backup catalog as well, but then you would have to choose during the merge how to avoid redundancies.
Good luck, Cornelia
Sorry, typo: a catalog is ending on .lrcat.
A catalog backup is just the same file as your working catalog at the time the backup has been created
So if you have continued afterwards with another catalog, then with the backup version again, you will miss some edits.
How often to create a backup?
You specify this in the catalog preferences.
For an enthusiast photographer who earns his living by some other job than photography, once a week may be enough, depending on how many shoots you create.
For a professional at least once a day or every time LR is closed would be more advisable.
You can always set it to "when LR next exits", which will do that, but leave your normal schedule untouched.
Advisable whenever you did big imports, edit sessions or changes.
Or before you feel inclined to do some reorganisation.
Save the backup to a different drive, as your main drive may fail... Dito for your photos themselves.
Thanks so much for your exlanation.
I'm not familiar with the term Delta,
it seems to mean the difference between the Catalogs
ie what is in one but not in the other ?
Also, is there some automated search to determine new images ?
or if importing a full backup cataalog is there a no duplicates option ?
Yes, "Delta" means the difference between two catalogs. It is usually used for increments, if one version has the same as the other but then still some more.
Determine new images: you could look by capture date.
I just tested what happens if you import from another catalog, that is already included in your current catalog:
LR checks for duplicates. In the options offered for "Replace" you can choose
- to replace Nothing: that means the current catalog wins and the overlap is ignored
- to replace metadata and develop settings only
- to replace metadata and develop settings and negative files: that means the other catalog wins, the overlap is taken from that one
If you are unsecure if you might have worked in both catalogs for develop, you can tick the box "Preserve old settings as a virtual copy": that means LR will know 2 develop versions afterwards, which you can manually compare and maybe cleanse any time later (or never).
So it will just take longer if you "Import from Another catalog" without first looking for the delta, but will give you the same result.
How many images do you have in your catalog?
With 100'000 or more it might take a while, for example a night.