Hi,
This weekend I thought I'd test the Dropbox Available Offline feature by storing travel documents there. On my PC I created a new folder and populated it with some PDFs. On the Dropbox app on my Pixel (Android) phone I enabled Available Online for the folder and viewed the PDFs in it with no problem. The next day while in a theater waiting for a show to start I verified that I had no phone connectivity and was not connected to any WiFi. When I tried to view the folder containing the new folder the new folder was marked with an exclamation point in a yellow circle. When I entered the folder all the individual PDFs were similarly marked and could not be viewed. That persisted for some time. Later when I was outside and had phone coverage but not WiFi connectivity I checked the folder again again and saw that the yellow exclamation points were slowing changing to green phone icons, and that PDFs with the green icon could be viewed.
Luckily I had paper documents. If I hadn't carried backups I could have been in trouble.
I thought that folders marked as Available Online could be accessed anytime with no connectivity, but Dropbox doesn't do that. Is my understanding correct? Is phone connectivity required? If not is it common for this feature to be unreliable or malfunction? Can this feature be relied on or should I choose a different mechanism?
Thanks,
Mike