The last version of DevonThink I tried, saved it’s database in a propriety format. Thus, you had two choices then: 1) Either import everything IN permanently…or 2) Just link to your originals on your HD. Number 2 seemed pointless to me, why have two copies of everything (and if I remember, DT did not necessarily update its own versions when you updated the originals?) And Number 1 - well, I personally want my data to remain in it’s original format, or be able to be restored for migration - which DT did not offer when I tried it. I see DT as a storage/organisational app. But in order to ‘store’ and manage files effectively, they need to be easily saved, and just as easily recovered again in their original format. Software that has propriety formats are a bit risky in this sense (same for Ulysses). Having said all that, I haven’t tried the latest version of DT.