... I have to manually download the files & had the scratch/[user] directory ...
Hi again @PhantomRick,
I have no idea why you will need to "manually download" anything. 🤷 Dropbox application take care for this, usually, and keeps the content in sync. The "scratch" directory is something for internal use and isn't officially supported! Actual place template (relative to phone common data directory) is: Android/data/com.dropbox.android/files/[user id]/scratch 🧐 which is something different from that what is in your post (order of 'scratch' and '[user]' got swapped, at least)!
... The scratch/[user] directories have disappeared. ...
If not pointed explicitly for offline access, on some circumstances, as pointed already, the 'scratch' content could get 'disappeared'!
... Files I download / mark for offline within the dropbox app are still saying they have been downloaded (green down arrow), but I can't find them on neither the internal storage nor the sd card.
Here I have to confess, I'm getting confused. Have you 'downloaded' or 'mark for offline' the things? These are two completely different things! Don't mess them. If you have downloaded something, it should be on same place where it have been downloaded, if not removed somehow. Dropbox doesn't anything to do here. If you have marked something for offline access, it should be on the pointed place above. If you can't find it, probably you're looking on wrong place, I'm guessing.
Hope this add enough clarity.
[user id] should be something like 'u235631156', not literally the same.
Anyway... If the 'files' folder is empty, I can't say anything more. Sounds very strange! As a last resort you can try application reinstall.
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