> I Imported this database in my laptop and I'd like to have an "offline" version of this database while I'm not there so I could do some work with the low res version of the file while I'm at home or traveling.
Do you mean that you want to export thumbnail images and work with those? You can use Thumbnail | Export to JPG files for that.
Meanwhile, if you use that database on your laptop (without having the actual image files), all thumbnails will technically be orphans. In order to view the orphaned thumbnails, Options | Preferences | Thumbnail | Show Orphans must be On, and the 'Auto remove orphans' option (in the same dialog) should be Off.
I hope this helps.